Parking panel used to have the same issue with me. Often it's not really your traffic. It's the company itself that's going bankcrupt and need ways to avoid problems.
Why the hell you keep 5k there anyway? Don't have paypal?
I have heard some pretty bad things about BigJumbo from friends in the parking biz. Why are there so many mixed reviews about your site. I have been following this thread for some time and i cant make two cents of it.
I am new join BigJumbo, they keyword optimization not good. but they PPC rate is good now.I have not received payment. I will be waiting to see whether the income of March for paid.