Now I understand the issue more clearly.

Because it is optional ..., and I can maintain my financial privacy by not using the bank card payment method, Fountain offering this will not have much of an impact on me, personally.

And since it isn't Fountain itself that is accepting the payment, they aren't the exchange and thus it shouldn't ever involve KYC. But yes, there is a link between Moonpay and Fountain now so who knows -- regulators regulate. But if Fountain needing to do KYC becomes a requirement, I suspect Fountain would kick that payment card payment method to the curb.