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.
At least, he can know about that, and he can register in that site. That will be useful for him to sign in that site because he can get an additional bonus if he deposits, especially if he can play poker better than the other people. But there is a risk to play poker, and the other gambling games, so he should always remember the risk and avoid that.