The three main websites for hentai as far as I am aware is
Steam, Patreon, and Dlsite.
Patreon has been cracking down on non-consent hentai for a long time, and recently just canceled something I was a patron of called agnetta. They also will likely crackdown on skimpy clothing art, mods, and games soon since investors don't like it hence the corporate war on hardcore porn, and softcore war
Dlsite locks most of their best, and nontranslated games with Japanese yen payments, and most aren't translated and require text translators. Also their from Japan where the feminist movement hasn't caught on yet.
And there is Steam. On many forums; the word on the street is that Steam isn't safe for non-consensual genres like hentai. Unless your a large corporation like Kagura Games, you are not safe on Steam, not to mention they censor like half of their games. It's the indie people that create most of these games that are being screwed the hardest.