I'd give it to the members who qualify for (Deserve) this badge of honor.
Maybe change the qualifications a bit though (if the program allows it).
For example...
The 1st 100 with 100 posts (or whatever# of posts).
Maybe leave it the way you have it (with 39 members) and if some of the Others show up at a later date, you still have the ability to grant them the badge.?
My feelings about "Charter Members".... Just because a person registered on this site back in the day, isn't good enough and That ALONE Shouldn't qualify them for Charter Membership. The people who stuck it out, continuously posting helping to keep this site Alive DOES!
JAT...These people were the Pioneers of this forum and IMO deserve a Tribute recognizing them for their efforts. I know some of them won't give a hoot whether they're recognized or not, But I Do, and I think it's a nice gesture on your part Rich for wanting to do so!!!
~Ray