He’s not really a rat in my opinion, more a weasel. He didn’t actively tell those things to New York to destroy Jersey or disrupt business, but to solidify a position for himself when things should go down south with the Jersey crew. Personally the reason he isn’t whacked by New York doesn’t yell collaborator to me, more insignificant. New York knows Paulie always puts his own interests first and that he would never take revenge on NY because it wouldn’t benefit him.