I just kept adding games. Skyrim, MP3, Ghost Recon, and MW3 worked. Even got some 24.99 games like DKC Returns, Smash Brawl, Tales of Vesperia, and Mario Kart Wii worked.
Ive gotten MW3 both systems, Twisted Metal, Max Payne 3, Skyrim 360, Ghost Recon to work. No particular order either. It even worked on my phone too before I got on the site and started ordering. Even made an order with Dark Souls PS3 at 34.99 with some 44.99 games that still worked.