if that's too boring I'll may do that for you: https://github.com/nostr-protocol/nips/pull/1369
Or is it https://github.com/nostr-protocol/nips/pull/1322 
https://github.com/nostr-protocol/nips/pull/1184
https://github.com/nostr-protocol/nips/pull/542 ? 🤔 

Ok, it's quite obvious. But others asked too before and got no explanation on nutzaps.