Let's see... crypto-miners hoarding GPUs by the tens, hundreds, even, driving up GPU prices for the non-miner. Also, when the cycle busts, hoards of cheap, abused mining cards flood the second-hand market, making it difficult for companies to sell fresh cards, and also possibly hurting the company's reputation when an abused mined-on GPU fails prematurely.

Miners can whine, all they want, but something needs to happen to hamper their greed for virtual money.