In my experience, Kontera is one the worst of the partners we’ve ever had. Right now they are tanking with pay outs down over 60% this year. They have very poor targeting. They ran Ford truck ads on our movie site that upset our readers. On top of that they are short on inventory and even if you have the traffic they cannot pay for it. We found them to be pretty sneaky. When we threatened to leave about the above problems, they scrambled to give us a better rev share, but they shorted us on inventory. We got paid less than before on more traffic. Finally when we demanded they let us out of agreement for the reasons above, they refused and will not send our final payments. Do yourself a favor. Sign up with Chitika or Vibrant Media. You’ll get a good rate, targeted ads your readers appreciate and as much inventory as you can sell.