There have been several inquiries lately regarding the sort people algorithms. As many of you have pointed out, the nuts and bolts of a few of the sort methods have changed recently. I can’t give away all of the secret sauce but here’s a few hints pertaining to how the algorithms work:
The cool part about the people categories is the Activity Period filter. Whenever you change the period, the rankings are determined on-the-fly. Everyday I check to see who’s tops for the day.