Oh yeah 🤘

Zapvertising pushes a note up inside the clients, but what the spend actually bought stays invisible. Zap receipts (kind 9735) are signed by the provider behind the lightning address; the receiver never signs one. A filter on the receiver therefore returns zero, because the receiver only sits in the p-tag. Public relays also serve just their newest slice of that. My own 24-hour sweep found 859 receipts from 340 recipients. The median was 21 sats, and that is a floor. Nobody can show what a campaign returned.