I finally looked at this thread.
The symptoms mentioned are visible in other organizations. Lions clubs, Red Cross, Rotary, etc. I have had conversations with friends about such organizations. Many are reporting lack of interest, lack of membership. Older members age out (die !) and for some reason, younger folk do not find the social milieu , or something, attractive to them. Oh, there are other groups forming, picking up, but the older, traditional groups seem to be faltering in some areas.