I seem to remember pornhub being hit by this, which is why they removed unverified content. Perhaps it's also why OnlyFans decided to ban explicit content a few months back (before backpedaling).

https://www.nytimes.com/2020/12/10/business/visa-mastercard-...

https://edition.cnn.com/2021/08/20/tech/onlyfans-explicit-co...