Stinky Pet Threat
Bink: Chloe! We have to decrease demand for this new tradable Guardian Cub! It threatens our gold-selling business.
Bink: Our usual customers will buy this and sell it in game for gold. Demand for our product will evaporate!
Bink: But not if nobody wants this stinky pet.
Bink: We start a whisper campaign. We make sure all of Azeroth knows that the Guardian Cub tortured everyone's favorite green hero.