To answer the original question: around, but not really active, as @i-am-insane said.
DD is pretty niche despite having, what is frankly, a pretty broad scope of what type of size content it allows. This is not a criticism; in fact, it is why I personally prefer to come here for my M/f needs, because I don’t need to browse through countless posts that don’t appeal to me. Or have posts being buried under said posts and not getting to the audience I wanted to share with. Unfortunately, that does also mean fewer (active) users and relatively less and regular activity than the larger sites.
In saying that, I think activity levels also come in waves. I, as well as others, were regularly posting/sharing things on here about a year(?) ago, but (and I don’t want to speak on behalf of everyone) we slowed, in part, because we had other things going on in our personal lives. It’s very hard for a relatively small group of regulars to keep that momentum up as we dropped off, one by one.
So…at the risk of sounding very obvious: I encourage you (universal “you”) to 1) post; 2) keep posting; and 3) don’t be discouraged if you don’t get the hits you want. Building up takes time.

like c’monnn
ahaha
Use either one of its mirror sites or alternative like Luna (who are the translators anyway).
may post them on BlueSky and/or DA as well).
