[Quasimofo]

Some additional comments on my survey submission:

I've begun rolling my own small leaderboard & badge/reward component for my (unlaunched) site and I'd be very interested to see what your API is like.

I'm a fan of the "serious game" element on consumer sites that suit it, though have little interest in seeing badges spring up on every second site I'm registered with (let alone virtual goods).

I checked $50-100/month as I've no good revenue projections yet and my site's market is relatively niche. Badges would be a nice flair, but I don't see a 3rd-party API pulling in >$100/month in value anytime soon. My site is already based on scoring so the leaderboard element is the one I'm focusing more on at the moment.