The law of unintended consequences applies. By not not processing porn payments the credit card companies force porn companies to generate revenue via advertising that works best if they give the content away for free. My surprise here is that Pornhub was able to process payments via Mastercard and Visa as I was under the impression that all porn was rejected by them already. https://www.vice.com/en/article/kb7ak9/the-secret-censorship...