OK, I read the link. They targeted Paysafe and PayPal AND VISA AND MASTERCARD AND DISCOVER AND JCB. All of them, in no particular order. Why did you not mention those?
Why are Valve's and Itch's payment processors, instead of citing their own policies, citing MasterCard's policies?
If "MasterCard doesn't care" then section 5.12.7 "Illegal or Brand-damaging Transactions" of MasterCard's rules, that specifically lists out transactions MasterCard prohibit processors from performing, specifically citing the percieved risk to MasterCard's brand... that's a really weird way for MasterCard to say they "don't care" about those exact sorts of transactions, which Valve's payment processors have been facilitating for Valve since 2018... until now, when a media campaign has put them and MasterCard, Visa, Discover and JCB on blast.
If MasterCard "doesn't care", let them show it by completely removing section 5.12.17 of their own rules. They made those rules, and those rules say they care, no matter how much you say they don't.