I wanted to make a traffic system like that before I found TrafficRouter, so that's a compliment in a way. But as far as your question goes, I use them and love them in every way. If you want to buy traffic, you can get decent amounts of it instantly and cheaply. If you want to sell your traffic you get bidders almost instantly, or at least I have that experience.
That being said, run along and signup through me.
http://www.adult.trafficrouter.com/?affid=67