Not a fan of porn games (which aren't available here anyway), but that is not a good sign.
Why would they even cater to payment providers? They should not be able to determine whether you bought a porn game or a regular game, just that it's something on Steam.
That is exactly why I don't understand why they have an issue with it.
They do not know if someone is using the store to buy porn games. So why care? Their concern should be profit, not national driven policies.