This has absolutely zero effect on Visa and Mastercard, they exist to make money and they’ll process any dollars they can, provided the chargeback and fraud rate is low enough. In the case of porn, it isn’t.

They’d probably need to charge merchants 5-10% fees to cover the fraud and chargebacks on porn sites.

Again, Visa and MC arent declining on ethical grounds, it’s not profitable for them without gouging merchants on processing fees.