PlanetOzh gives a positive review of WP Questions:

Over the recent months, a site that can make you big money has really found its audience, from a clever promising idea to an active community of users. I’ve already mentioned it when it started, and I mentioning it again now because it is getting big: WP Questions.

If you don’t know this site, the theory is dead simple: people ask questions and disclose the little amount of money they’re willing to offer, experts answer and hopefully win the cash if their answer gets selected.

Since its debuts, the site has gained real traction and what used to be cheap ass $3 questions are now much more interesting little gigs. Interestingly too, there are now coders who completely offloaded their support to WP Questions, such as Ronalfy with his WordPress and Ajax ebook.