Icehole,
I think that the culling has pretty much ended. As of now inactive accounts are not being deleted. Keep in mind that this thread was started over five years ago.
The main purpose was to get rid of dormant spam accounts. But sometime after this thread was started Dave Smith came up with an alternative method for spam control which has been remarkably effective. Thanks Dave!
This thread should probably be locked since it has been rendered obsolete.
If you want to communicate with anyone from the Thunderbolts Team you should probably use the contact page on the Thunderbolts website:
https://www.thunderbolts.info/wp/contact-us/