free play is just what is sounds, chances to play for given to you by the casino for no cost. You can get them through promotions or for signing up for their players club. Those are usually the cheaper $5-$10 ones.
However, how do I redeem Mlife free play?
Next, what game can I play to win real money? Earn money by playing games on Android and iOS devices
In any case, do casinos mark their money?
You responded to "Do Casinos Mark Their Money" with a resounding "no." However, I was in AC last week and the craps table dealers were putting a stroke on the incoming bills (probably $100) with a pen leaving an invisible mark.
How does the Mlife card work?
Through M life, players receive points when they play at slots, table games or spend money in MGM properties, and these can be exchanged for rewards including meals, free play, retail, experiences and a whole lot more depending on your status.