Actually, seems like the problem is not on our side, as it is a change of PayPal policy. It looks like PayPal got a lot stricter about accepting payment by our customers. They actually require that everyone has their profile at 100%, otherwise a payment won't get through. I may be wrong, but that seems to be the cause of the problem since some of the users actually managed to buy Supporter and second team option just minutes ago. Try to complete your profile on the PayPal page and then try again, if it doesn't work, let me know. Or try AdKnowledge SuperRewards. It works.