I'm no expert on this tbh. But their should be a way to make this work. There's even platforms rn that allows incest
That's because they are small enough that Mastercard doesn't care, just about every major digital payment processor in the West is owned by them (that includes Stripe). It's done on purpose and the pattern is always the same, a platform starts up and there are little to no rules (as long as there are no legal violations) and then AFTER it gains enough of an audience that it won't instantly die from censorship is when the hammer comes down.