This news (Mashable link) [mashable.com]
was released today about Gamestop's new pre-owned subscription service PowerPass.
You have to prepay $60 for a 6 month unlimited plan, allowing you one pre-owned game out at a time.
Have to be a Power-Up Rewards member, but both the free members and the paid members qualify.
Starts November 19.
also edited, an article from polygon (polygon link) [polygon.com]
describes how the keep one at the end of the subscription works:
Update: A GameStop representative has confirmed the plans. Players can choose any game they played in their six-month subscription to keep at the end of it, not just the last one played. This is why the PowerUp Rewards membership is needed, it helps GameStop track the games users took in and out of the store.