The issue is and always will be the fiat gateways. If you do sufficient volume, someone's going to snoop around and ask questions like, oh, I don't know "where did you get this money and what did you say your business does again?" BTC is not a solution to this problem either. Maybe for the buyer since they're low volume enough not to raise eyebrows one way or the other, but as the vendor it just won't help.
Why not just exchange btc/eth and leave the headache away? Pornhub should move to btc - at least they'll educate some population about cryptocurrency/how to use it. There are many ways to move money in/out, I think one of no fee paths is via bybit (just network fees).