An active thread at XDA has multiple posters (here, here, and here) claiming that Sprint is cutting off shipments of the Optimus G, and that the device has reached 'end of life' status, meaning it will be discontinued soon. One poster included a photo of an inventory spreadsheet indicating as much:
Two other posters claimed to have received similar information, one of whom suggested quite correctly that the Optimus G's recent participation in the "buy one get one free" promo means Sprint is probably trying to clear out remaining stock. The Sprint Optimus G continues to show as in-stock at most major online phone retailers (Sprint, Amazon, LetsTalk, Wirefly), though it's often local resellers that are first affected by an EOL situation, because their shipments are much smaller and more frequent.

- [Deal Alert] LG Optimus G For AT&T And Sprint $99 ($100 Off) For New Accounts And Upgrades
- AT&T's Optimus G Will Be Available November 2nd For $199 On Contract, Pre-Orders Start Tomorrow
- Update: Sprint Announces No Mail-In Rebates Through April 16th
- Sprint Announces The Optimus G Will Be Available On Nov. 11th For $199, Pre-Orders Start Nov. 1st
Is Sprint Already Killing The Optimus G? Signs Point To 'Maybe' was written by the awesome team at Android Police.