Considering the symbiotic relationship WoWHead has with Blizzard Entertainment and the fact that the PTR itself is massive marketing for the game by keeping the game always in the news cycle with updates. I don't really think that Datamining will be removed unless the Datamining continues to lead to wholly negative PR which again that will end at some point once everything they want removed has been removed from the game. Not to speak of the fact that this relationship has existed for decades and is therefore more like precedent than anything else.
Also this thread is probably not the best place to discuss this as well we kinda love that aspect of the game.