nostr:npub1vhvlvrmdk8tgpu7nkrlhjua6e0z5cdgfm83qcez7exyh4lhfkxzqzyjr2q open, in the same way ATProto is 'open', or whatever the fuck 'FLOC' turned into that Google deployed in Chrome which also isn't 'open'.

Open in theory, not in any practical sense.