I'm going to throw this out there and hope no one is offended...

E-rewards claims to try to detect fraud, so I've always tried to keep my answers honest and consistent across surveys. Because of that, I only qualify for the full survey maybe 1/3-1/2 of the time. But I'm offered roughly 1 survey a day, sometimes more.

It could be a total BS threat but I wonder if "trying" to qualify for every survey somehow blacklists people? Or rushing thru as quickly as possible?