Agree that the facebook version of Myvegas earns loyalty points the quickest, but in my experience it's harder to get the coins to play with. Among the apps, the blackjack app seems to have the best earn rate. But the BJ app requires a lot more attention and interaction. You theoretically can run the facebook game and all four apps at the same time if you have enough devices to run them on, which would increase your earn rate. I tend to stick to three at a time or else I'm not paying enough attention and lose all my chips.