Doughboy/jms... great thoughts, however I don't know how that would work in practicality (being the devil's advocate for a second). As dough said, some sponsors decide based on numbers alone (for better or for worse). For example when I approached umnitza a long time ago, they said come back when we have 1,000 members.
If we did that, it'd probably be best to introduce a new number completely, such as a forum active ratio count, but that wouldn't mean much to very many people, and most wouldn't take the time to read about it.... so at the end of the day, would it be worth all the programming and time invested? It might be a "cool" feature, but when you balance the positive benefit from it with the effort it would take to make it, I'm not sure if it results in a good answer.
And Death, "A mari usque ad mare" means "From Sea to Sea", Canada's motto.