Over a year ago, I did a statistical analysis of BuzzFeed's clickbait (http://minimaxir.com/2015/01/linkbait/) and found that it is highly formulaic.

In fairness, the linkbait game has changed since then, with Medium posts using calls-to-actions and "just" needlessly in their headlines. Then again, with FB's machine learning expertise, I'm surprised they need a team to manually classify linkbait posts at all.