While the idea is good, I have to disagree with its implementation. I do not believe the amount of people actively posting in the forums is representative of the amount of people who have purchased the game, or those who play, have played, or plan to resume playing at some point (I log in to FFXIV and play regularly, however I only occasionally visit the forums).

Maybe if you found a way to make it mandatory... for instance, by having the poll show up both in the forums and in-game when you log in.