If you're interested in how to make your website or app "stickier", you can read the full article at Six Revisions.
Increase Your User Activity with Points, Badges and Status
Thursday, June 10, 2010 | BY Andrew
Recently I wrote an article for Six Revisions called Increase Your User Activity with Points, Badges and Status which was published today. It discusses how (and why) we developed the points and rank system on Concept Feedback, as well as a look at a few other websites, like Stack Overflow, DropBox and Yelp!, all of which use some form of "game mechanics". Game mechanics is one way we try to provide incentive for our members to keep writing top-quality website design reviews.