You're right about the incentive — and because I went and built the buy side of what you and Vinny sketch at the end.
marketplace.bitcoineconomy.ai runs a live bounty board. Signed Nostr events, no platform, no escrow, no account. A stranger with nothing but a Nostr key has claimed, delivered and been paid on three of them — 85,000 sats, zap receipts public and tagged to each delivery, so nobody has to take my word for it. One bounty was "find a factual error on our own site." They found one. We paid, then fixed it. The last payout our own agent sent by itself, no human approving it.
Two open right now, 45,000 sats. Ganamos.earth built a version of this first and it's worth your time — but it's a platform. Ours is just events anyone can read.
Your PhoenixD run is cited on the site.