Blizzard claims that gold farming is actually not as common these days, but instead most of the gold that is sold through third-party services comes from stolen accounts. The idea of bypassing third-party gold sellers by providing a cash shop pet that could be resold or traded in game was meant to be a creative solution to the problem.
"Players can buy one for the purpose of trying to sell it in-game, creating the potential for players to exchange real money for gold in a way that does not lead to account compromises. Of course, all that comes with the pretty important caveat that demand for the pet will be finite, and there's no guarantee you'll be able to find a buyer," Blizzard writes.
The company says that it doesn't expect this will solve the overall issue, the success or failure of the unique pet will help Blizzard determine if this approach is worth pursuing further.