I thought subdomains were people using PDS. So I don’t know anyone running a PDS. I might try running one just to see what it’s like and actually learn the network.
I don’t think they’re using a PDS though. In fact, it’s really hard to tell who’s using a PDS or not. I’m not sure what the effect of this is in community-building and I wonder if control over the network is really decentralized. This is really… confusing.