My guess is too much strife taking its toll. Some people being unwilling to accept others point of view or personality or lack of tact or whatever and driving those away that didn't fit their notion of the correct. As if everyone on a forum must be your best friend and agree with you on everything. It's not so. All we have to share is one interest and allow for other points of view.
So anyway, eventually all the 'undesirables' were driven away, at which point the instigators decided this place is no fun any more and left as well. Leaving behind us never say die that has the place limping along on life support.
Sometimes I dream in colors
It always happens when
I find myself with others
Who don't pretend