So I don't play slots or anything like that really but I have seen the odd "free money" offer in Poker lately. This is obviously in the form of tickets. Right now on GGpoker you get like 60$ in WSOP tourney tickets if you deposit 20$. I unfortunately had already registered there so I don't know the ins and outs but sounds like it's instant and you can play with them. Most are satellite tickets but it's still free to play.
They give 60$(wsop tickets) automatically within 6 days and an additional 40$ in tickets if the user will active in "all-in or fold". This promo is a good deal if the user has some experience in poker, but he didn't have an account on GGPoker.