For example looking at this bridge

They have publicKey ... #main-key

This is good

But they dont do the same for the profile

It should be person ... #me

This is a general breakage across the fediverse, which is a relatively mature eco system. You can just about get away with these interop bugs

Bluesky is a whole other world, new clients, new servers, new identity schemes, new URI schems, lots of stuff that isnt finished.For example their DID identity method is called "placeholder". It's going to be really hard.

What they should do is align their keys with nostr, and create an overlap, and simple way to communicate with nostr. Then each of their other ideas they should see if they can fit in to the eco system piece by piece. Some will work, others not. Hopefully they will make a good looking app, that can also become a nostr client though.