The closure means Rockstar is removing all the online features from Midnight Club 3: Dub Edition and Dub Edition Remix, Grand Theft Auto: Chinatown Wars on DS and PSP, and Beaterator. The racers are losing all online multiplayer as a result, while Chinatown Wars and Beaterator are dropping their Social Club features. The music mixing game is also ditching track uploading and downloading.
No surprises: Grand Theft Auto 5 is totally unaffected, and online multiplayer gameplay remains intact in GTA 4, too. However, GTA 4 is dropping multiplayer leaderboards on PS3, while all platforms are parting with Social Club stat tracking and leaderboards. By the by, all of that also goes for the Complete version of GTA 4 and the Episodes from Liberty City.