Check out traffdaq, it has over 1000 webmasters.
The system can auto-scale and I will show you how if you're interested. If you don't know what TraffDAQ is, I promise you will love it. We currently have:
* Over 1000 exchange partners
* All main niches
* Will scale automatically with your traffic, so you won't have to worry about finding new trade partners
* The tool turns non-unique CLICKS into unique VISITORS (no bullsh*t, have a look at the infographic)
* Snowball traffic multiplication effect
* Easy geo-targeting: just pick the countries you want and the conversion is done automatically through our bidding system
* Reliable anti-cheating system
* Fair trades through the credit system
* Autobidding so you can set it up and forget about it.