IBTD:
It's a rather tough policy, "iron" is a good synonym, but it is successfull: There are plenty members and the CC level speaks for itself.
I guess, though, that there's a different secret to success, probably including club-life and tournaments. Anyway, Courteney's work and dedication is one-of-a-kind! Kudos!!
But, as Kelsey indicated, to each his own.
If I would only exclude all our inactives over three months, we'd be (guess) 100 only with little chances to fill up, due to our self-imposed limitation to one language.
Therefore, I follow a different path. I keep the number up, 241 now, and remove the inactives by date, one by one. Today, the "last date played" limit is 2014-1-1. Before you ask, I do agree that there's hardly any difference in having 10 or 150 inactives, but it's nice to be near the top of the German CC list ;)
I have lowered the fluctuation by being reluctant to accept Hacks and Amateurs. Too many of them play only a few days - no good members :(
It's obvious that people may lose interest in the game after a while. Some relevant periods of activity apparently are
- one or two days,
- one week,
- one to 1.5 years.