Yes, in fact the ex-Paypal employee at Patreon who is making these censorship decisions explicitly mentioned the credit card processor guidelines as the reason

Yes, in fact the ex-Paypal employee at Patreon who is making these censorship decisions explicitly mentioned the credit card processor guidelines as the reason for their recent censorship. It's difficult not to see this censorship as something other than cartel-like behavior on the part of credit card processors.