As Bungie moves away from Halo and leaps into its new Universe, 343 Studios reels in Halo's entire Universe which means that all the Halo 2, 3, ODST and Reach Matchmaking statistics needed to be moved from Bungie's servers to 343's.
The Transfer and the effectsEdit
The transfer started some time in the summer of 2011 and will end on the 31st of March 2012. Once the last bit of data has been transfered it'll be the end of the Halo era on Bungie.net.
All live Halo data will be managed by 343 Industries, and Bungie will no longer be able to update game stats and player service records, to host new user generated content, or to operate the Bungie Pro service.