I'm not the most active member of this forum just now, so my comments on the lack of activity on this forum could probably be filed under "dingo's kidneys"
The TGO Challenge section is probably quiet because there's also a tgochallenge.co.uk website with a forum thats been going a long time and is where most TGO Challengers make comments and have arguments. That forum has been quiet too, but TGO Challenge traffic is pretty seasonal and will be busy between Christmas and May (roughly)
So that bit is a duplicate and its been a quiet time anyway.
I can't account for the rest, although it would seem that membership of the "community" is relatively low compared with other forums and people just don't have anything to say and aren't being routinely "poked" by the staff with stupid questions such as "What is your favourite hill?" and so on as in another forum that I never look at (obviously). Many other forums (?fora) seem very quiet too. Maybe it'll all pick up in the winter. Maybe we should get a few trolls to ask "Scarfell - will I need kraberiners" (sic), "Should I take my girlfriend up the miners track?" and "Magnetic North, True North,Grid North, North Face - Just how many Norths do we need and why I never bother with a compass or a ruler"