To be honest,
@Listlad, I doubt it's that there is little interest in it, but to be honest, the chances of someone like me, living about 150 miles away, being involved in a group there is unlikely.
My assumption (and it may be wrong) is that the core objective of the group is to attract patients of their own to adopt lifestyle changes, to encourage better health outcomes. Someone, they know nothing of, posting from afar is unlikely to be affirming for those people. (Assuming anyone can sign up.)
I'm impressed they have built up 149 members, but the more important stats are on electronic footfall and whet the members do when they log in.
I envisage newly diagnosed, relevant people, and those having reviews, will be sign-posted to the group. Signing up and doing anything with it are very different things.
I truly wish the group well. I am not, in any way poo-hooing it. All I am doing is attempting to apply a practical overview.