User blog comment:BrianXP7/New System of Featured Content/@comment-18467653-20140312211905/@comment-5394692-20140313214251

It works like this. When there seems to be something trending, most viewed, most edited, most talked about, etc. we add it. If there's 4, we'll remove the rightmost featured page and put the new one on the left. (Instead of replacing it completely every few weeks-months.)