Poker Zombie
Royal Flush
Don't say "for poker buyin" or "gambling." But I've never had a problem.
There were issues with PayPal when it was being used for PokerStars tournaments, and if I recall, a member got his account locked. Since it is attached to your bank account, you cannot just open a new account. As far as I know, nobody was foolish enough to list poker, gambling, or PCF (which has it's own non-gambling connotation). The number crunchers aren't dumb, and they do care about their service being used legitimately.