I had spent a year or so on a Sagazone forum of interest to me, contributing to various interesting discussions. Suddenly several of the busiest discussions just vanished without warning or explanation (apparently because the thread starter had been banned). When I contacted the mods and expressed surprise, wondering what the point of contributing was if it could be deleted like that, they simply deleted my membership.
I then discovered that there had been considerable upset with moderation on the site overall, as whole forums had recently been deleted. People were asking where everyone had gone. I can tell them - they've left in disgust, or been banned, or deleted by the mods.
This is a site that seems to be in free-fall.