Want to know more about the Superstars tag given on each section of TSR

Hello Friends,
I have a doubt that arose within me when I was going trough the Forum section in TSR. I think the Superstars tag are given for the members according to the post in that particular section. Recently I saw an article in Forum section posted by Naina Khan which was about the Newbie tips. Though the thing was there in the Forum section the points from this was not included for the Superstars tag in that particular section. So Now I have a doubt why the points were not considered for Superstars tag when they were available in Forum section? I also want to know if the Superstar Tag is important in each section?