Maybe I'm just old-fashioned, but I still kind of think that the incentive to buy the packs ought to be with the packs themselves offering high quality, interesting, and bug free content that people want to play.
Buying the pack because it is the only way to get some piece of loot, seems like a lame excuse for putting out shoddy content that people would otherwise not want to play. which seems awfully gimmicky and like poor business practice. At least to me.