It's good that people start to talk about Nostr founding, given the situation of the Mac client Damus that went viral here recently.

This is exactly what I do for a living: Finding monetization possibilities for niche products.

So I won't come up with a solution here, without charging a lot of Sats 😏

But so much in advance: Nostr has marketing advantages that no other social media network has and you must know how to utilize it. The first one to utilize this advantage and integrate it into their Nostr client will have many imitators. Because this isn't just an easy solution. You'll have to set up a small eco system around it, but the effort will be worth it.