Hey Frameworks Engineer , I just tested the mockup project I made for WWDC, and it does look like the backend bug has been fixed, and exchanges - finally - work as documented. Great! I'll update the Github project so it properly shows the exchange data as part of the game date, something I obviously hadn't been able to test - until now. This should get a lot more attention than it has so far, as this means trading games and all kinds of amazing game mechanics are finally supported by Game Center! Amazing and super exiting!