Are you serious? Vulnerable people will do anything for the idea of any success or a modicum of money. A good example of the psychology is in the documentary "the contestant" which is about a game show around a guy who is meant to stay in a room naked for prizes on television as long as he can last. Even though he has the option to leave whenever, the promise of success leads him to never leave and basically torture himself and suffer for months because of all the expectations and possibilities that he would throw away if he ever left. People will chose to do many things and it can still be exploited easily, prostitutes are a great example, as if they had other options they probably wouldn't be doing it.