User blog comment:Keplers/Hey, So, I'm Gonna Brag/@comment-5510093-20140104165058/@comment-1693968-20140108152819

Each wiki receives its score automatically. It only does the top 5,000 wikis, though.

I'm not entirely sure how it works, but from what I've seen here's my best guess. It's basically a score of how healthy the wiki is, meaning a good balance of views, edits, activity, and that kind of stuff. We're really heavy on activity, and low on views, so we get a lower score than other wikis that are less active than us, but receive a more balanced amount of views. Since we don't get the appropriate amount of views, our activity doesn't give us as many points. It still counts, but not nearly as much as it would with an equally balanced amount of views.

Does that explanation make sense?