Yea. I noticed that GTM is slowing down too. Agreed, I do want to see new showcases.
There was a rush of the old forum users (You, Inf, Psy...) to Gametechmods, it lasted one week, and started some days after Atari deleted the Stock part of the forum. For a while. But even if it is dead, it is the official forum and people are still posting on it precisely because it is.
This rush is now finished, and I do believe some people just don't like Gametechmods or don't want to swap forums. You certainly know, when a community moves to an old forum to another, some do not.
Goose's idea of redirecting there wasn't that bad, perhaps. Or perhaps doing some more GTMs ads on the official forum...