Well to start off, FreePlay is basically defined as credit to play in a slot machine for free in order to win real money. Anything you make off of the FreePlay, is yours to keep...or play with.
Free Slot Play is non-transferable, cannot be converted to cash and must be played at a slot machine before other credits. Once you have downloaded Free Slot Play, you must play at that machine. The amount you select to play must be divisible by the denomination at play.