They are not the most popular content, but they are always there if you want to visit and get glamours, relics, or mounts. Also, there are new players trying it constantly, on top of several weekly runs to clear BA and DSR.
Surely it wasn't the most entertaining or exciting content back then. They were trying new things, it needed some tweaks, they overpromised, but it was something, especially in contrast to now when we have received a whole lot of nothing.