"If you have already downloaded the game, you can still play them for as long as your PlayStation Plus subscription is active." 
If I subscribe to PSN+ and then my subscription runs out, then I won't be able to play the games that I got for free right?
But if I buy the games from their retail price, then I can play then until I get sick bored of them right?
How about the ones that have a discount?
Feel free to add me as a friend. Just put "playstation forums" in the friend request.