Hosting adult content/games isn't illegal (Pronhub would go out of business if it were).
They only care about copyright.
Put up a game you wrote yourself... no problem. Put up a game written by someone else is when they might take notice.
Even then, they don't (generally) actively curate content on they host - instead waiting for someone (who asserts they own the copyright) to report a specific file.
A lot of hosting companies will point out that the files aren't actually directly accessible, even by themselves without a link, so nobody knows the contents of the files (mega for example). Individual hosters may have adult restrictions, I don't know.
So if someone reports it, then they take down the file. Probably. But it'll need someone to tell them it shouldn't be there first.
Head to the
Latest Games page, go to the last page (oldest) and pick a game at random. Chances are most of those links still work, nearly 4 years later.