I have a confession to make, and kind of a warning. I've made a lot of money colluding with a friend of mine playing 6 person SNG's on the merge network. If you play SNG's online, be careful. It is easy to cheat and they do nothing to stop it.
That being said, I don't enjoy it. It was an easy way to consistently win on average $100 an hour but I never felt good after a great day. I quit doing it, but the other guy still does with someone else that he found on there, so just be careful. I'm sure if we did it then other people do it.