The demo uses Fashion blogs as sort of a litmus test for the overall market and to test viability of the product. I don't know a ton about fashion, but there are certainly a lot of fashion bloggers.<p>The basic score you see next to each post is a breakdown of Pageviews + Tweets + Likes + Pins + Google+'s + internal likes (called Points). Some quick basic math creates a score based solely on that data. All posts can only live on the leaderboard for a finite amount of time (rolling 7 days as of now). I think it's a neat spin on quality, decided organically.