Don't really know.  Those boards are regional boards, and the TS board is national.  However, I have no clue if that makes any kind of difference.

It might have something to do with an antiquated notion of privacy.  Some "straight" guys are fearful of being identified as going for the TS, and some GG providers are so frightened of TS that they won't see a guy who has seen a TS.

It's a weird world.