Relays that want to be public or semi-public need more ways to discern an npub that has a real person behind it from an automated sybil attack, and this is a great idea.

But instead of selling npubs someone should sell badges.

But if you're doing it from a physical location then a badge could just be given for free as long as the process can't be automated.



Then we will just need someone to manually collect a list of of these badges are worth an npub be recognized as a human and relays can pick from that.