Why does Blackrock TBC not have its own forum (like wotlk)

There is "Forum - Wotlk - BlackRock" here: https://forum.warmane.com/forumdisplay.php?f=253 but nothing of the like for TBC.

TBC should either get its own category, or the description of the existing one should be changed to include both TBC and WOTLK

I suppose having seasonal Blackrock subforum would be reasonable.

Flairs could also work, just like we have Realms/Website here.