I'm working on an iOS/macos nostr client called Damus. I'm thinking of a scheme using lud18 to create proof of bolt11 payments using nostr keys. This will allow you to do lightning tips over nostr in a secure way: talling tips on posts, fundraisers in a post, etc.
Excited to start implementing this soon as this may be one way to incentivize running nostr relays by donating a proportion of your lightning tips to the relays you're connected to.
My nostr relay will be making some cash!
Are you also thinking about WoT type things, or verifiable credentials?
love this approach to incentivizing more people to run relays