Then that's an active clan... A clan with buffers, rechargers, etc is fine if they are logging in and doing stuff.
If the clan is active enough to rotate entire CPs through a clan and back to the main clan, then they are most certainly active enough to keep their CH. They shouldn't lose it.
I am talking about when a Clan totally quits and becomes inactive (or has like 1 guy log in, add adena to CWH, afk for a bit then log out).
If the GM puts an inactive clan up for auction, who will really care but those inactive players? Having inactive players who don't even play the game bitch and moan about GM Decisions is still much more preferable to....
1) Mid-Tier clans being dissuaded from joining in on End-Game PvP
2) Mass PvP being limited on a month where a top-tier clan gets overbidded or leader forgets to bid or some shit.
3) Having to place a down-to-the-last-minute bid every month that greatly impacts your clan
Find a solution to those three problems and I'll hop on the Monthly Clan Hall Bidding wagon