I may be wrong, but from what I know, John Osteen, the father and elder Osteen, started the ministry. John Osteen seemed to be an alright fellow. But all of this other, I'm not so sure about. Obviously, if photos were sent out showing flooding that did not happen per the daily mail; that would seem very wrong and folks should know.
John Osteen, I think his name was John, was really a fairly minor player compared to Joel. I have no idea if they basically preach the same thing. I'm not sure if Joel preaches the so-called "prosperity gospel". There are plenty of sources of inspiration out there. I was never swept up with Joel. I had one of the elder Osteen's books. A decent read.