This is just my opinion, but i think it is sad that a game like WoW offers almost no progression after you completed main quests, raids, professions, (you get the point), in other words the state MoP is in now.
The only real thing we can keep as a PERMANENT REWARD are the VANITY ITEMS, except a few, (pets, mounts, items, SoO Looms, transmog), meaby gold for some, and this makes me a bit sad that a huge game like WoW has nothing more to offer, and for many these "things" are useless!.
Players put so much effort & grind in acquiring the current "top" items, witch renders almost useless after the current patch/expansion has passed.
Come on Blizz, VANITY ITEMS, srsly?
Edit: I think many voters vote YES on the poll because they have poured so much money in to their mounts & other vanity items. The poll was meant to be targeted at rewards you get in game, not things you buy with real money, sry for not clarifying that in the poll!