I have an XHamster account. I always enjoy sharing the content that I shoot, and I really do enjoy the website, but you're right ...the spam messages are out of control. They should go though and clean out some of the fake user accounts, which would make for a better and more user friendly experience for the legitimate users with real profiles.
But yeah man, it would be better if there were not so many spam messages and bots. I usually just report them and block the user.
What do they get out of it? I have absolutely no idea whatsoever.
TrueAmateurModels.com X-Hamster
https://xhamster.com/users/TrueAmateurModels