User blog comment:Argorrath/Call of Duty: Ghosts's "Team Leader Pack" and "Ghosts Insignia Pack" revealed/@comment-4921618-20130924230752/@comment-1187559-20130924231504

BF4 did it, Skyrim sort of did it, Mass Effect 3 did it. A lot of companies have done it, it's more for enticing people to be involved for the long run.