User blog comment:Collector1/What I think Will Get Rid of Moded Lobbies/@comment-25496444-20120523182328/@comment-813072-20120523185618

My guess is that they don't really care about the old game/are too busy working on new DLCs for MW3. Also, Per MLG, sometimes it's to annoy people, plus IW isn't too happy about people modding their games, i think everything is going to stay the same.