Yes.
Yeah that’s what nostr:npub1jvxvaufrwtwj79s90n79fuxmm9pntk94rd8zwderdvqv4dcclnvs9s7yqz pkarr does as I understand it.
Is it your contention that basically the DHT is incapable of supporting that? So either the public keys will not show up or it’ll clog up and grind the DHT to a halt? That would be funny tbh
Discussion
This is a good piece to read into, hopefully it will answer some of your questions - https://medium.com/pubky/public-key-domains-censorship-resistance-explained-33d0333e6123
The article doesn't address the scaling issue.