myVegas Slots is the Facebook and mobile game where you can earn rewards for playing casino games.
Here is a link to get 500,000,000 free myVegas slot chips on their Facebook game. HURRY AS THESE LINKS EXPIRE QUICKLY.
Playing the online games allows you to earn Experience points or XP towards earning rewards.
Here are some sample rewards:
The more you play, the more XP you’ll earn, and the more rewards you can redeem in Las Vegas.
Here is an article that goes into far more detail about saving money in Las Vegas with myVegas games. Good luck!