Anyone who has run a bath with the plug half out knows the rule that governs it: the level depends on the difference between what pours in and what drains away. A strong tap can still lose to a wider drain. The rule is obvious in a bathroom and easy to forget in a market, where the flow everyone can see, a fast-growing product or a famous partner, tends to stand in for the balance that sets the price.

Airlines learned this with their loyalty currencies. A frequent-flyer mile is issued every time a member flies or spends on a co-branded card, and it keeps its value only while the programme absorbs about as many miles as it issues, through award seats, upgrades and status that has to be earned again each year. If issuance runs ahead of those sinks, the airline raises the price of an award and every mile in every account is worth less, which is why the big programmes keep inventing new ways to spend miles.

Plasma is a stablecoin chain and the company that builds it, Plasma One is the card and app that company runs on its chain, and XPL is the token at the centre of both. They are three parts of one project, and the card is where they meet.

Plasma One sits on both sides of the airline's ledger for XPL. It pays its cashback in XPL, and it takes XPL in when its best customers lock 100,000 of it for a year to reach the Platinum tier; a third link, a buyback funded by card revenue, does not exist yet. Behind all of it runs XPL's vesting schedule, the timetable on which the team's, the investors' and the ecosystem fund's tokens become free to sell, and from 25 October it releases about 228M XPL every month.

The card is growing: it settled $92.87M of spend from launch to 18 October, and September's $25.6M was nearly three times June's. XPL stood at $0.0775 at 19:15 UTC on 20 October, 95.4% below its $1.68 high. So the question this piece answers is the one an airline's finance team would ask: can the sink keep up with the tap, and can Plasma One absorb XPL's unlocks and lift the token back towards its high?

We set the bar at 30% of supply held in card locks. That is 2.18B XPL by September 2027, about four-fifths of what the year unlocks, and short of it we do not expect the card to carry XPL back to its high. We read Paymentscan's onchain card data to 18 October, CoinGecko's prices at that hour, Plasma's published tokenomics and Plasma One's own terms, and ran the next twelve months on three paths: growth holds at the recent pace, growth fades as it has been fading, or there is no growth at all.

• A real card business. Plasma One settled $92.87M of card spend from launch to 18 October 2026 (Paymentscan), and September's $25.6M was nearly three times June's $8.97M.
• Growth has paused. Weekly spend has sat between $6.6M and $7.3M for the four weeks to 18 October, and 1,011 people made their first card payment in the week of 12 October, against 3,082 to 4,794 a week in late July and early August.
• A year of unlocks. From 25 October about 228M XPL unlock every month; the next twelve monthly releases total 2.73B XPL, worth $212M at the 20 October price of $0.0775, and lift circulating supply 60%, from 4.53B to 7.27B.
• No buyback, no staking. As of 20 October Plasma has announced no buyback and no staking rewards; a buyback of half of a 1% take on card spend would retire only 0.7% to 5.7% of the year's unlocks.
• The card pays out more XPL than it could buy. Cashback to 18 October came to $2.13M, 2.29% of spend, paid in XPL; over the next year the card hands out about four and a half times as much XPL as that buyback would take back.
• Locks are the sink that works. 1,149 Platinum and 239 Core cardholders had 120M XPL locked on 18 October, 2.64% of circulating supply, and about 62 new Platinum lockers have arrived each week since late August.
• Locks soften the unlocks but do not absorb them. Net of the locks that lapse, card tiers would take about 11% of the XPL unlocking by September 2027 with no growth and 46% if growth fades; only if spend kept the last nine weeks' pace all year would they take 77%.
• The 30% bar is a long way off. Locking 30% of September 2027's supply means about 21,800 Platinum locks, about 19 times today's 1,149 and more than the 12,641 people who spent on the card in the week to 18 October.
• Stripe is a card deal so far. Stripe and Plasma announced multi-currency stablecoin cards on 15 October; neither named a role for XPL, and Stripe's list of stablecoins does not name USDT0, which held 89.4% of card balances on 16 October.
• A return to $1.70 is a 22-fold rise. At $1.70 XPL would be worth $12.35B on next year's supply, 35 times its $351M market value on 20 October, and a Platinum lock would cost $170,000.
• Platinum pays less than its headline. Its 4% cashback applies to the first $3,000 a month, the median spender put $66 through the card in the week of 12 October, and the AI credit pays at most $900 a year against the $1,400 the Platinum page shows.

Plasma One is a Visa card with an app around it, issued by Third National, part of Rain, for people outside the United States. It is a secured card: every purchase is backed by stablecoins in the cardholder's own wallet, mostly USDT0, the form of Tether's dollar token that moves between chains. Cardholders earn cashback in XPL at a rate set by their tier: Lite is free in most regions, Core costs $199 a year or a 20,000 XPL lock, and Platinum takes a 100,000 XPL lock for twelve months. Every payment settles on the Plasma chain, so Paymentscan can read the card's business day by day instead of waiting for a company report.

That record shows a card that has found its customers. Monthly spend went from $1.1M in March to $8.97M in June and $25.6M in September, growing 346%, 163%, 69%, 31% and 29% month on month from May, more slowly each month. October is running higher again, with $17.5M in its first 18 days and $30.3M in the 30 days to 18 October.

Against its peers, Plasma One is a serious programme, though not yet a large one. Of the eleven stablecoin card programmes that Paymentscan listed with record months in September, it came fourth at $25.6M, behind EtherFi's $128.8M, KAST's $113.8M and Wirex One's $47.6M. In the week to 11 October, when stablecoin card spend across the market reached a record $319.2M, Plasma One's $7.28M was about 2.3% of it.

The cardholders behind those figures are loyal. About 70% of the people who first spent in March, April and May were still spending three months later, and card balances had reached a record $18.26M by 16 October, up from $11.17M at the end of August, with another $14.64M in Earn, the app's savings vault (Paymentscan).

They are also concentrated. In the week to 18 October the top 1% of each day's spenders, 226 to 283 people a day, did 42% of the card's volume, and the top 10% did 83%. The 12,641 people who spent that week are about 6% of the 207,918 registrations Paymentscan has counted.

Around the card, the chain is smaller than it was. Stablecoins on Plasma came to $1.33B on 20 October by DefiLlama's daily count, up from $942M on 1 September but far below the $5.87B of 1 October 2025, a week after launch. That figure belongs to the chain, and it frames the card's role: Plasma One is the most visible use Plasma has today, and the main way the chain's activity touches XPL.

The monthly totals hide a flattening. Weekly card spend was $6.83M, $6.70M, $7.28M and $6.62M in the four weeks to 27 September, 4 October, 11 October and 18 October, a trend that slips 0.1% a week. The nine weeks to 18 October still show growth of 6.2% a week, about 30% a month, but that window reaches back into late August, so it leans on September's climb.

New cardholders have slowed more. First-time spenders ran at 3,082 to 4,794 a week in late July and early August and have been 1,010 to 1,511 a week since mid-August. The number of people spending in a week was 12,641 on 18 October, below the 15,449 of 14 August.

Paymentscan's count did jump from 12,193 to 20,510 on 30 September, then fell back to 12,251 on 7 October, seven days later. That was one day's burst of small payments passing through a seven-day count. The week's first-time spenders were 1,511, against 1,190 and 1,259 in the weeks either side, far fewer than the 8,317 extra spenders the count showed overnight.

Think of a new restaurant. The first months fill with curious first visits; after that, the business depends on regulars coming back and ordering more. Plasma One is in that second phase now.

Between the week of 14 September and the week of 12 October, people spending in a week rose 10% while spend per head fell 3%. The median spender put $65.56 through the card in the week of 12 October, and one in ten spent $931.56 or more. With more regulars each spending a little less, the next leg of growth has to come from reach.

On 15 October Stripe and Plasma announced multi-currency stablecoin cards, with Plasma as Stripe's design partner. Stripe's announcement covers cards in five currencies (US dollars, euros, Brazilian reais, Mexican pesos and Colombian pesos), USDC, OUSD and other stablecoins eligible under the GENIUS Act, the US stablecoin law of July 2025, and more than 30 countries today, with plans for more than 100 in 2027.

Someone holding euros could spend them directly on such a card, without converting through dollars first, where Plasma One today turns the local currency its cardholders add into dollars. That gives the growth paths below more support. It does nothing for XPL yet: neither announcement named a role for XPL or a launch date, and Stripe's list does not name USDT0, which held 89.4% of Plasma One's card balances on 16 October. A partnership that widens the card's reach widens the sink only if more of the new cardholders lock XPL.

We ran the next twelve months on three paths from September's $25.6M, the last complete month. Growth holds keeps the nine weeks' 29.6% a month all year and ends at $577M a month in September 2027. Growth fades starts at the same 29.6% in October, then keeps, each month, 0.94 of the previous month's growth, as September kept of August's, and ends at $236M.

No growth holds spend at $25.6M a month. The paths are arithmetic on the record, not forecasts, and the four flat weeks to 18 October make the high path the hardest of the three to reach.

Plasma does not publish what Plasma One earns. A card programme earns a share of the interchange fee that merchants pay the card's issuer on each purchase; Europe caps that fee at 0.2% to 1.5% of a purchase, and the split between Plasma and its issuer is not published either. We assume Plasma keeps 1% of spend, which is generous as a gross figure.

On that assumption the card has earned $929K since launch. Over the next twelve months it would earn $3.1M on $308M of spend with no growth, $14.1M on $1.41B with growth fading and $24.1M on $2.41B if growth held.

The card's payouts are public, and they are larger. Cashback to 18 October came to $2.13M, 2.29% of spend, paid in XPL: more than twice what a 1% cut would have earned. September's four weekly payouts, $479K, came to 2.27% of the $21.1M spent in the four weeks to 20 September that they paid for, and October's weekly payouts were $127K on 1 October, $182K on 8 October and $167K on 15 October.

Plasma has not said where that XPL comes from. We traced it on the chain in September: 15M of the 25.6M XPL sent since March to the wallet that pays the cashback came through a Plasma vault fed by the ecosystem treasury, and none of what we traced was bought on the market. The other 10.6M came from a busy wallet we could not identify.

In plain terms, the cashback is what Plasma pays to win customers, and it pays in its own token. Card programmes often start this way: rewards build the habit, and the margin comes later from scale and leaner rewards. In September the four weekly payouts came to $479K, against $211K at 1% of the spend they paid for, more than twice as much.

The card's issuer may change. The day Stripe's cards were announced, Plasma's chief executive, Paul Faecks, said the company is moving to Stripe's stablecoin card infrastructure, without giving a date, and Plasma's own Platinum page still named Rain as the issuer on 20 October. Whoever issues the card, the split of its fees is unpublished, so the 1% stays an assumption and the cashback stays the larger flow.

XPL's supply runs on a published clock. Ten billion XPL were created at launch on 25 September 2025. The team's and the investors' shares sat behind a one-year cliff, a date before which none of them could be sold, and on 25 September 2026 a third of each, 1.67B XPL together, unlocked at once. With the ecosystem fund's 88.9M XPL for September, released the same day, that took circulating supply from about 2.78B at the end of August to 4.53B.

The other two-thirds unlock monthly until 25 September 2028, beside the ecosystem fund's 88.9M XPL a month. From 25 October that comes to 228M XPL a month: 88.9M from the ecosystem fund and 69.4M each for the team and the investors. The next twelve releases total 2.73B XPL, worth $212M at the 20 October price, and take circulating supply from 4.53B to 7.27B, about 60% more.

The first release, on 25 October, is worth about $17.6M and adds 5.0% to circulating supply, and the same pace runs on for a second year. The schedule does not say who sells what unlocks, only that 228M more XPL become free to sell every month. XPL was $0.101 on 29 September, four days after the cliff, and $0.0775 on 20 October, 23% lower.

Nothing on the other side of the schedule is switched on. Plasma plans to pay validators, the operators who confirm the chain's transactions, new XPL equal to 5% of supply a year, falling by half a point a year to 3%, but only once outside validators can join and holders can delegate their XPL to one of them for a share of its rewards; its tokenomics page gives no date for either. Base fees, the minimum charge on each transaction, are burned, which takes that XPL out of supply for good. On a chain built for free stablecoin transfers the burn is small, and there is no buyback.

The most direct way for a card to support its token is to buy it, so we tested a buyback Plasma has not announced: half of a 1% take on card spend, spent on XPL at the 20 October price. That is $1.5M over the next year with no growth, $7.0M with growth fading and $12.1M if growth held.

It would buy 19.9M XPL, 90.8M XPL and 156M XPL: 0.7%, 3.3% and 5.7% of the year's unlocks. Matching the unlocks this way would take about $42B of card spend a year, about 140 times the card's rate in September.

Cashback runs the other way. At September's rate of 2.27% of spend, the card would hand out 90.1M XPL over the year with no growth and up to 706M XPL if growth held, about four and a half times as much as the buyback would retire on any path.

Because most of the XPL traced so far came from Plasma's own wallets, we count the cashback inside the ecosystem fund's 1.07B XPL for the year rather than as supply on top of it. It is the part of the unlocks that lands in cardholders' wallets, where each of them decides whether to keep it.

Over the year that is 2.73B XPL unlocked, 412M XPL paid as cashback with growth fading, and 90.8M XPL bought back on the same path, or 156M XPL if growth held.

Card businesses elsewhere in crypto have made the link explicit. EtherFi, whose card did $128.8M of spend in September, puts part of its protocol revenue, its Cash card's included, into monthly buybacks of its ETHFI token, on top of weekly buybacks from withdrawal fees. Its foundation reported buying 432,217 ETHFI for $293,228 in the week before 19 October.

Christian Angermayer, Plasma's founding investor, wrote on 15 October that the team intends the value it creates to accrue to XPL holders, without saying how. Until a mechanism like EtherFi's exists, card revenue reaches XPL only through what cardholders lock.

A lock does what a buyback would, and Plasma does not have to pay for it. Think of a deposit on a flat: whether the tenant borrowed the money or had it saved, it sits out of reach for the length of the lease. On 18 October 1,149 Platinum and 239 Core cardholders had 120M XPL locked, 2.64% of circulating supply and 1.20% of all XPL, worth $9.28M at the 20 October price. By 19:15 UTC on 20 October the lock contract showed 1,158 Platinum lockers.

Platinum still costs 100,000 XPL. In the week to 18 October the locked stock rose by 6,380,000 XPL, exactly 59 new Platinum locks at 100,000 and 24 new Core locks at 20,000, and Plasma's Platinum page asked for 100,000 XPL on 20 October. New Platinum lockers have arrived at about 62 a week in the seven weeks since 30 August (36, 65, 56, 88, 67, 62 and 59), against 34 a week in the nine weeks before, even as new cardholders slowed.

At a steady 62 Platinum lockers a week, with 70% of today's locks renewed when their year ends, the card would hold 398M XPL by September 2027. With Core lockers at their recent 19 a week it would hold 416M XPL, 5.7% of the supply circulating then. If new lockers grew with spend instead, the year would end at 1.36B XPL, 18.8% of supply, with growth fading, and 2.23B XPL, 30.7%, if growth held.

Thirty percent of September 2027's supply, the bar we set at the start, is 2.18B XPL, about 21,800 Platinum locks: about 19 times today's 1,149 and more than the 12,641 people who spent on the card in the week to 18 October. Only the growth-holds path reaches it, and that path needs about 1,200 new Platinum lockers a week by September 2027, about 20 times today's pace, each locking XPL worth $7,746 at the 20 October price.

Two of Plasma's own terms could move this either way. Its help articles disagree on whether Platinum renews itself unless cancelled or lapses to Lite unless renewed. And its help centre still calls 100,000 XPL a launch promotion, with 150,000 standard and renewals at the price in effect then. At 150,000 a lock, with as many people locking and renewing, the no-growth path would reach 607M XPL, 8.4% of supply, though a renewal costing 50,000 more XPL would put some people off.

Put the flows together and the bath becomes arithmetic. On the growth-fades path, the middle of the three, card locks, net of the ones that lapse, would take 46% of the year's 2.73B XPL and a buyback 3.3% more. The remaining 51%, about 1.40B XPL, would stay in circulation to be held or sold.

In dollars at the 20 October price, the year's unlocks are worth $212M. Net new locks would absorb $23.0M of that with no growth, $96.4M with growth fading and $164M if growth held, and a buyback would add $1.5M, $7.0M or $12.1M. Cashback on the middle path would put $31.9M of the unlocked XPL straight into cardholders' hands.

On every path but the most hopeful, card locks take between 11% and 46% of what unlocks, and the rest has to find buyers. A lock takes XPL out of circulation whether it was bought for the lock or already held, so the card is a real sink, though not yet a large enough one.

XPL fell hard in its first three months and has moved in a narrow range since. It closed September 2025, its first days of trading, at $1.02, October at $0.30 and the year at $0.16, and through 2026 its month-end price has stayed between $0.0735 and $0.106.

It ended September at $0.0949 and stood at $0.0775 on 20 October: 55% above the $0.05 that Plasma's 2025 public sale paid, 29% above June's low of $0.0601, and 95.4% below the $1.68 high of 27 September 2025.

At $1.70 XPL would be worth $7.71B on today's 4.53B circulating, 22 times its $351M market value on 20 October. On the 7.27B that will circulate in a year it would be worth $12.35B, 35 times, and $17B fully diluted, counting all ten billion XPL, those still to unlock included.

The steps on the way are large too. $0.25 is 3.2 times today's price and a market value of $1.13B on today's supply, $0.50 is 6.5 times and $2.27B, and $1.00 is 12.9 times and $4.53B, or $7.27B on next year's supply.

Set against the nearest peer, those numbers look stretched. ETHFI, the token of the EtherFi protocol whose card did about five times Plasma One's September spend and which already buys its token back from revenue, had a market value of $685M on 20 October, with all of its supply circulating. XPL's fully diluted value that day was $775M.

EtherFi runs a restaking business beside its card: ether staked through it also helps secure other networks for an extra reward. Plasma is a whole chain, so neither token is priced on its card alone, and the comparison shows how much of XPL's value already rests on something other than Plasma One.

There is a ceiling inside the card as well. Platinum is priced in XPL, so the lock costs $7,746 at the 20 October price, $25,000 at $0.25, $100,000 at $1.00 and $170,000 at $1.70, and Core's 20,000 XPL lock is $1,549 today. The higher XPL goes, the fewer people can afford the lock, so the card's main sink shrinks as the price rises.

Plasma's Platinum page sells the tier on "4% cashback on all purchases" and "over $10,000 in annual value back". The help centre's bands show what sits under those lines. Platinum pays 4% on the first $3,000 a month, 3% on the next $7,000, 2% on the next $5,000 and 1% above $15,000.

Core, at $199 a year or a 20,000 XPL lock, pays 3%, 2% and 1% on its first three $1,000s and 0.25% above. Lite, free in most regions with a $10 card fee in some, pays 2% on the first $500 and 0.1% above.

The effective rate falls as spend rises. On Platinum it is 4% to $3,000 a month, 3.3% at $10,000 and 2.9% at $15,000, while Core pays 2.0% at $3,000 and Lite 0.42%. The $10,000 of annual value needs about $34,500 of spend a month for the $7,500 of base cashback inside it, when the median spender put $66 through the card in the week of 12 October and one in ten spent more than about $930.

The perks are narrower than the headlines. The AI credit pays 10% on the first $500 of AI spend a month and 5% on the next $500, $900 a year at most against the $1,400 the page shows; it replaces the base rate instead of adding to it, and counts only when the AI company bills the card directly. Airline cashback is 10% at 13 partner airlines booked directly, up to $600 a year, and the ChatGPT and Claude perks are rebates of up to $20 a month each.

Two of October's offers for Platinum members follow the same pattern: 10% back at listed wellness brands from 7 to 21 October, capped at $75 and paid as spending credit after a 45-day hold, and 10% back on purchases made directly from Apple from 16 to 29 October, capped at $200 and paid in XPL after the same hold.

Cashback is paid weekly in XPL at the payout day's price and carries XPL's price risk from then on. Plasma can pay it as spending credit instead, and pays none on crypto purchases, transfers, gift cards, gambling, ATM withdrawals or tax. The lock runs twelve months with no early unlock, Plasma warns that XPL in its vault could be lost, and it can change rates, bands, lock amounts and exclusions at any time.

For the cardholder, the lock is the larger risk, and it cuts both ways. Someone spending $3,000 a month earns $1,440 a year on Platinum's ordinary bands, $1,290 more than Lite would pay. A 19% fall in XPL over the year would cost them the whole $1,440 on the $7,746 they locked, and a 30% rise would add about $2,320.

Ordinary cashback covers a 30% fall from about $5,500 a month of spend and a 50% fall from about $9,800, and the cashback itself arrives in XPL. After a year with a 30% fall, someone spending $1,000 a month is $1,844 down on the lock net of cashback, and someone spending $10,000 a month is $1,636 up; after a 50% fall the first is $3,393 down and the second $87 up.

A bath fills when the tap outruns the drain, however impressive the drain. Plasma One is a real and widening drain for XPL: its spend nearly tripled from June to September, its early cardholders keep spending, Platinum lockers arrive nearly twice as fast as they did in August, and Stripe's cards may let it spend in more currencies.

The tap is fixed and larger. From 25 October 228M XPL unlock every month, $212M of tokens over the year at the 20 October price. Card locks would take about 11% of that with no growth and 46% with growth fading, and a buyback of half the card's revenue would add 0.7% to 5.7% while the cashback hands out about four and a half times as much XPL.

Only if the recent pace held for a whole year, against the four flat weeks to 18 October, would locks reach 31% of supply, past the 30% bar, and take 77% of the unlocks. That path needs about 1,200 new Platinum lockers a week by September 2027, while new cardholders are slowing.

Airlines facing the same imbalance have two levers: build sinks faster, or issue more slowly. For XPL the first lever is Plasma's. A buyback funded by card revenue, as EtherFi runs, a role for XPL in the Stripe cards, or Platinum lockers compounding for months without slowing would each change the balance. The second rests largely with the team and the investors, whose choice to hold or sell what unlocks no schedule can set.

On today's data, Plasma One can soften XPL's unlocks but not absorb them. A return to $1.70, a 22-fold rise on 60% more tokens and 35 times the market value of 20 October, needs demand from far beyond the card.