One of these guys is going to make a fortune by being honest and dominating the market. Most of them pick up peanuts and start a new site. Instead of being business men, they are scammers.
We thought makeBTC was doing that then the website shut down; then we thought ponzicoin was going to stay bc Vor invested a lot of time and effort and kept innovating but he shut down all the websites without taking more money than fees but he still didn't reimburse me for my deposits who were going to be paid because I was next line and I had the last deposit (I will say when he does, the escrow is suppose to reimburse me for that)
It is probably a lot of hassle to run a ponzi, it is easier to stop it after a nice profit apparently; you would think some programmer starts a professional ponzi with a nice website and advertise it well