> What is the logic?

The logic is that people have flagged it, but not enough for it to be marked [flagged], which downranks it. dang, if notified or interested in it himself, could turn off flagging for this submission which would likely bring it back to the front page (given comment activity, age, and current score). You could email him and ask nicely.

You've been on this site for 4 years with 57k karma so you must be very active here, I'm surprised you don't know this yet.