Free Play and Point Play are not the same thing. I am guessing that your friend has $1000+ in Point Play, not Free Play because Free Play expires if not used immediately.
Free Play is given with a promotion, e.g. "Two nights and $50 Free Play" or Free Play won in a slot tournament, somthing like that. It is good only during the specified period of the promotion or slot tournament rules, or you lose it. (I learned this the hard way.)
Point Play is points (dollars) earned by your own play on slots/VP, etc. (I don't know if table games earn Point Play.) Point Play dollars are good for an extended period, like 6 months or 1 year or something. At MGM properties used to be 18 months. I believe you do earn points while playing them, but can't swear to it.