Well maybe you've just the nail on the head there
marksawatsky , albeit perhaps not in the way you intended.
You "belong to some other forums as well". "A few years ago they were busy busy"...
How many motorsport forums are there now and how many were there 5 five years ago?
I suspect the rate of increase in the choice of forums over the past 5 years far outweighs that of the fans who would seek to join one. Thus the entire activity on motorsport forums becomes more and more dispersed, especially when posters have ever more choices to jump ship to whenever something or someone upsets them on the forum they're at.
Maybe it's just that we live in an era when the age of the big "corporate" motorsport forum
a la 606 is over, and forums are now destined to become smaller and more dispersed in terms of traffic, as I don't believe the number of motorsport fans increases at the same rate as the ease in which anyone can set up their own forum...