I'm not going to go naming names... You want to see who is over there, you can go look for yourself. There are folks over there with a ton of experience and knowledge and people I respect.
All I will add is that as the QDMA forum started to show some division....HT was formed. I was not grossly involved in that process so I can't/won't speak to those details. When the QDMA forum had the plug pulled officially some of those habitat refugees went to HT and others came here to this newly founded forum. As for the HT forum there was some disagreements and the like that led to yet some additional fragmentation that become the forum that the link in the OP is to. I am a member to all three (even a few others) simply because there is resources there that I value, and people I respect.
I will say that I am not aware of that group having ANY desire to be connected to the QDMA. That group may show up if you do a search or the like, but you will not see the Q logo or any evidence of trying to pretend to be linked to that organization from what I have seen, and I am over there on a regular basis.