My impression is that he had nothing to do with the girls hooking up, except that he brought them MDMA (unconfirmed I know, my opinion only.) Anna took it, started getting sexy and arousing the other girls. The girls had spoken previously about how Megan had never had an orgasm, and I think that Rebecca took advantage of the sex in the air and decided to make a move.
Again, my opinions only, but I don't think his presence there is anything to do with money, although don't get me wrong I'm not a fan of his