User blog comment:2ks4/Triple XP session Wednesday, March 16, 2011/@comment-74.77.16.186-20110323200246/@comment-3455248-20110324012026

I think since it's coming up on a year after release, the triple xp is a way for Rockstar to generate additional interest in the game to keep people playing who otherwise might have moved on to other games. It also keeps people talking about the game and watching Rockstar's feeds and "there's no such thing as bad publicity" particularly when they have a major new game coming out in a couple of months.