I guess Hinn is not a good enough con man to refrain from giving time frames, although if he is a lurker here, we just helped him with that. As an agnostic, I could care less what sort of religious doctrine Hinn and his televangelist ilk promulgate, but I think that people give money to televangelists for the same reason I chose to spend my money on professional wrestling: it's all entertainment. I look at Benny Hinn the same way I look at any musician, actor, or sports star. Some people just like their act.
I think one of the reasons folks go to his shows is to watch him bowl people over like ninepins. In that sense, you're absolutely right.