No way with such a low fraud rate that PayPal just suddenly decided to cut you off. I'll bet good bitcoins that somebody (i.e. the admins at overclock.net) tipped them off.
I basically live by OCN, but I know those mods, and if one of them tipped PayPal off I'm gonna be really mad. There was a huge thread about it with like 3000 replies on OCN.
EDIT: Yea it just go closed,
http://www.overclock.net/other-software/1001123-earn-your-gpu-bitcoin-mining-guide-165.html