Does the Interestingness algorithm ever change? Why?
Yes. The algorithm is under development and occasionally a new version is deployed. There are two main reasons for this: a) the new algorithm works better and b) it disrupts patterns that allow the same people to feature in Explore day after day. In other words, it shakes things up so that new people can get in and diversify Explore. It’s gone through at least three major revisions. The original version only showed something like the top 50. It was later expanded to show the top 500 and the calendar view was added. There were two additional algorithm changes in February and June of 2006.