I know when they were threatening to pull out of OnlyFans and Pornhub, the big concern the payment processors cited was child abuse. I don’t know to what degree that’s the entire story, so take it with a grain of salt.

Their complaint was that the primary method those sites had to prevent child porn from being uploaded was reports from other users. By definition, this means that the site has to allow the child porn to be uploaded, and only then takes it down after it’s been reported. So someone must have seen it before it gets removed. They said they didn’t want to be associated with sites that share child porn. That’s why PornHub removed a TON of amateur content and changed their rules so that all users who upload content have to be verified on the site. That’s their new control to prevent child porn.