I think the whole thing is a big con and the network producers of those shows are laughing all the way to the bank. They are preying on people who will literally agree to do anything to get their 15 minutes of fame.
The show reminds me of watching another con, Dr. Oz, when he tells people that some roots and dirt ground up in a blender will taste exactly like a chocolate Sundae. Then you watch the people gag it down and summon every ounce of muscle control to not puke it all up and forfeit their chance to be on TV.