Yeg made his own tool, without asking fiatjaf for permission, and his tool is interoperable with all the other nostr dev apps.
To put this in perspective think of how feasible it is for a non company dev to build something compatible with twitter, or any walled bigco. Also think of all the dev ideas that dont make it past the central planning committee.
Nostr is an unbounded sandbox where you dont need permission to play.
*Thump*
quoting note157p…cly7YEGHRO (npub1lqs…cejr) has a great inactive npub finder and unfollow tool
https://unfollow.yeghro.site/