I've visited Vegas a lot of times--a lot. And, Vegas uses a gimmick that's been around for a long, long time. At a lot of the casinos, when you visit them, or when you're booking a Vegas tour, or when you arrive at your Vegas hotel, there's often free goodies: free slots play, free gaming play, free gaming lessons, bingo free game coupons, keno coupons, and sometimes there's free tee-shirts too. So, what's the catch? Well, they (the casino owners) figure that if they can get you in the door of the casino to play their "free games" they've got a good chance (far better than no chance at all if you don't enter their casino!) that you'll play their free games (like bingo free games at their bingo room) and then maybe feel an obligation (especially if you win) to stay and play with some of your money. Therefore, they'll get something back for the bingo free game, or the free slots play, or whatever free gaming play they're offering. Moreover, bingo Internet game sites use the same techniques. If they offer bingo free games, they may get you in the virtual door with your bingo card in hand (so to speak), and if you like what you see, you'll stay and play a bingo game or two--that's the catch.
