On these shows though, the parishoners DO look good!
I see at least two reasons for that.
First, they have a target demographic and stick to it: people who already have tasted some success and want more, MORE, MORE! They aren't looking for new members at the rescue mission; they preach in the suburbs--not the slums.
Second, it is just what Minimus called it: a show. Not everybody who's there will be on the camera, only those who project the desired image. Those who don't fit in won't be part of the show. They are selling a dream, and that vision is the only one you'll see. Does this remind you of another organization that likes to keep the congregation clean?