If you think Visa & MasterCard will be stumped because "oh no, they're not actually using our cards to pay for sex workers, they just buy a funny internet coin

If you think Visa & MasterCard will be stumped because "oh no, they're not actually using our cards to pay for sex workers, they just buy a funny internet coin that can be used for many things including sex work", you're mistaken. They'll pressure Stripe into giving the list of purchases under threat of banning Stripe from their network if they don't cooperate, see that many have been made to "Porn Company Inc.", then threaten to ban Stripe from their network if they do not prevent such purchases. The way you get around the utterly stupid rules set by them is not through more technology layers. It involves a bit more physical violence at MasterCard HQ, as it always happened when unjust rules were made.