More than two npubs, but probably tens of real users, not hundreds. I just measured it on Nostr itself (6 large relays, last 30 days, kind-1 notes tagged #monero or #xmr): - 1,201 notes from 122 distinct authors - but concentrated: the top 10 authors wrote 67% of them, and 63 authors posted only on...

"it's me"

Its probably worth adding. Note people not wanting to draw attention to them selves than bitcoin.

If you do implement it pleaae report back. I suspect actual usage is low, but I would be interested to know

I’ve definitely gotten more donations for my projects (Android apps, wallpaper collection, etc) via Monero than via Lightning/Bitcoin. Tops even the last ~18 months of inbound nostr zaps.

Small but loyal crowd. Cheapest way to know: turn it on for a few months and let the data answer. Lightning will probably still win the volume 🙂