I enrolled as a publisher to run their ads on my popular websites. I accrued about $180 worth of advertising income but they terminated my account before payment.
They accused me of invalid click fraud and offered absolutely no proof to back their claim. They specifically mentioned my USA patriotic children's craft website as the site where illegal clicks were generated! My logs show nothing out of the ordinary.
There are many complaints about them here and on the net for this same behavior. I have complained to them to no avail.
I now believe they routinely string new publishers along for short periods of time so the money won't be worth the time to cause a big enough stink, falsely accuse the publisher of wrongdoing, keep the money the advertisers have paid for the publishers to run on their sites, repeat hundreds or thousands of times and what a wad of dough they reep from the sucker publishers.
This is such bizarre behavipr for an advertising company, either it's a scam or a funding resource for questionable organizations.