A few weeks ago, when ClixSense lost their PayPal account, people speculated who will be the next victim. Earlier this week, the admin of GrandBux announced that their site is no longer accepted. The admin contacted PayPal to release the funds being held and plans to add new payment methods.
HitClickFlow suddenly became unavailable on Friday. Shortly after, the admin posted his explanation on Facebook why he closed the site. He claimed, he accumulated $15000 that he has to pay off.
An AppleBux (buxapple.com) user complaining that his payment was marked as paid but the money did not arrived to his Payza account. He is accusing the site to show fake payments in the "Payment Proofs" page.
Another member posted a fresh payment proof in the forum, so AppleBux probably pays selectively.
I received my second payment from LogiPTC on February 9. I got my money after 12 days, which is a bit more than the normal waiting time. However we have seen much longer delays on other sites.