Stop Gold selling websites or put a dent in them at least by selling ESO+ scrolls that can be sold on the guild trader.
Therefore people that do not want to use their credit card online or go to the store to get a card can buy with in game gold to the person that would have just bought the gold from a 3rd party source anyways.
Non game breaking. Pay to win? Yes. But he was going to pay anyways remember. Just not to you ZoS.