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.
Much like the adult section of the movie rental place, or the romance section at the book store, or the sex toy section at Walmart, you are free to not browse the content you are uninterested in.