It's a survey for Wowhead to refocus their marketing target audience(s)... probably the users that don't want to pay for Premium so that the ad's aren't 'irrelevant'.
How do you find out about surveys / giveaways ? I'm on Wowhead every day and only been able to compete in 1 contest the love is is the year pin giveaway . Actually i have been trying to get the achievement (That's some dedication) only missed 3 days in the last year ugh! but i'll get it sometime with in the next 240 day's finger's crossed LOL