I think we are discovering new aspects of nostr. We may need to add some sort of endorsement tag - different than following. I’ve seen this idea of endorsement and attestation in digital trade documentation, but it has not crossed over into nostr yet. The closest thing so far is attestation by nostr:npub1cn670f663n3ks02jnnlsvd5y88zjnefy8343ykaxs7y3nzzketrsrjwt8a