Did you read all the terms?
"Before creating a new account ...
We strongly urge you to carefully read and agree to our Terms and Conditions stated on this page. In our efforts to maintain the effectiveness of our program we do not accept certain kinds of traffic and traffic from certain areas of the world. So please read the terms to make sure that you are eligible to be a PimpRoll webmaster before you sign up.
Thank You,
PimpRoll Crew "
www.pimproll.com/terms.html
They have alot of them more then average I'd say