That is an awesome tool, but I realized one thing. I am brand new, five days old and one of my followers is dead. How is that possible? It means that somebody, and I know who because they added a few bucks to a post by voting, has not posted but remains active. A lot of the vets don't post often but seem to vote up stuff on a regular basis. I wouldn't totally discredit all of your 19.5% dead followers. Since you have been here a while, some might be vets that don't post much anymore, but remain active.