Damus
fiatjaf · 3w
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 ...
inkan profile picture
npubs that are part of Inkan identities are recorded on Ethereum when the identity is created.

The recording of an identity currently costs about $0.80 - $1.20 in gas fees. Users can make a request for sponsored payment of the gas fees at https://www.inkan.cc.

I guess it's not a sure-fire way to distinguish npubs that have real persons behind them from those that don't, but it's definitely a signal.