I have absolutely no idea! That's a great question. There is no way to tell how many members there are unless MCN queries their database for the number of members. Looking at our member ID numbers isn't enough to tell since MCN uses those numbers for several of their fan clubs and websites.
I'm not sure. Good question. Maybe Drew will see your question - he usually knows stuff like that :)
By the way - if you are on facebook, join the "group" - Eric Church is my Homeboy....lots of great posts there.