Consumers are revolting against payment processors who seek to ban adult-themed Steam games, movies, and art. A Change.org petition aimed at Visa and Mastercard is rapidly gaining support. Its organizers also wish to limit the power of activist groups that influence these companies.
100% a change.org petition makes news which is useful but won’t otherwise do anything. What you need to do to back that up is cost Visa/Mastercard money, and the way to do that is to call them and tell their ethics teams that what they’re doing is deeply wrong.