FREE.
Even better, but No Thanks.
It would come back around and the fine print would Have us doing "Special Guest Appearances at Events" and other such Lackey things.
A reasonable fee and a token of appreciation would be nice now that the Ten Year Anniversary has been reached.
This short description from the "Glossary of Terms" at GeoCaching.com
Charter Member:
During the very early years of Geocaching.com when Premium Memberships were first offered, they were called Charter Memberships to thank those who supported the web site. Be sure to thank the Charter Members you meet on the trail since the site would not be here today without them.
Rarely happens. Even if I do major maintenance on somebody else's Cache.