I don't think it preys on the vunerable, people have freewill entering a cult and if they let themselves become brainwashed than that's just that. Scientology isn't exactly an economy in its own right, WallMart is much worse in my opinion.

Its run by intolerable people but then again alot of religion is like that, blindsight faith with the emphasis on blind. These people obviously do very well at doing whatever it is they do, the fact Tom Cruise is a scientologist and he has completely lost the plot makes a bold statment in my opinion.