I think they are shooting themselves in the foot. This strategy may work for us old gamers, but I think the next generation may vote with their wallets.
I have five boys and they've mostly moved away from mainstream games to online and small market options which are either free or much less expensive. The only time they might buy something at release is if it was a game they played before, and that introduction was usually via a used game.
Sony should know better from what has happened in the music industry. Old games are no longer valued commodities, they are marketing pieces for new releases. I bet they would sell more new games by simply giving away the older titles to get new consumers hooked on a series than trying to nickle and dime profits out of them.
So long as the paperwork's clean, you boys can do what you like out there.