These days, I don't pay much attention to traffic systems. However, there is one system I liked.
These are the reasons I like this system:
1) It offers a free list management system for all members.
2) I can build my own list, create an autoresponder and send broadcast for free.
3) It has a unique ad tracking system that ensures that my ads are really watched, not just getting clicks.
4) Its link tracking system is top-notch. It can tell me if I'm getting real visitors or just bot clicks.
5) I can get SEO traffic from its Social Review system.
6) I can get traffic from hundreds of other traffic networks without having to join each of them.
This is really a system with lots of potential and it's FREE to join. Check it out.
Also it has an affiliate program with recurring commissions.