What drew you to join RallyPoint and what keeps you here? How many of the first 1,000 members are still here?

I received a couple invitations to join RallyPoint last year but didn't act on it until this year. I joined based on an invitation and have stayed because of the on-line friendships and communications. Sometimes I agree with posts and sometimes I don't; but, I have been favorably impressed with the respect that RallyPoint members usually display for each other and the quality of the discussions.
Does anybody know what happens when a person leaves RallyPoint? I expect their member number is "retired."
The easiest way to find your member number is on your profile page - the URL at the top includes RallyPoint member number -- military specialty.
[2015-07-10 Update - MAJ Yinon Weiss provided the link for each of us to see our own influence score - http://www.rallypoint.com/influence
Background: RallyPoint launched in beta mode on Veterans Day, in November 2012. It opened up to all service members and veterans on Memorial Day, in May 2013.
SGT (Join to see) SPC Elijah J. Henry, MBA CPT L S CH (MAJ) William Beaver GySgt Wayne A. Ekblad CW5 (Join to see) SSG John Erny, 1SG Michael Blount SGT (Join to see) LTC Stephen C. SMSgt Minister Gerald A. Thomas