You have to throw the right ball to get a response, and as times have changed, the balls also need to change.
There is also the problem of forum overload, (Look back at the earlier days of SZ and you will find the manufacture specific threads were as busy as the General thread) which has exploded in recent years, thus the jam gets spread super thin.
I put a stop on joining new forums some time ago, as otherwise it would just have got ridicules.
While diversifying into new is good, diversifying the same (Which a lot of forums now do) is bad.
Happy posting
Bill