Yep, in my book, a month of inactivity pretty much makes u ineligible to remain a member.
Most CC's operate that way.
My CC is extremely small, but very active and fiercely competitive, we have several members who always figure on the weekly leaderboards, but nonetheless, we still don't have a 100% turnout for all our comps.
Since I joined I believe I have entered every competition put up, virtually