Quickly looking it up, Payhip does not seem allow adult content? (Or have you seen people using it for that purpose?)
Everything that is on Itchio is staying on Itchio, but as I mentioned above, I do not know where I will be moving fan comics such as "Two of Hearts" or "Delicious in Dungeon" to -- since I don't quite feel my Itchio page is the best for things like that. (But, if I have to move them here, I will.)
Illustration collection PDFs (like the Stardew one) are less likely to be moved here for multiple reasons.
Everything I've ever made is up on a site that's exclusive to my Patrons and not at risk of being censored-- so that's truly the best option, really.