Probably a naive/stupid idea but how about: - Add in-app purchase for 1000/$1, 2500/$2 and 5000/$4 "tipping tokens" (sats), respectively. - Enable the function only if LNURL is configured. - Auto-generate withdrawal url + invoice as post-purchase hook - Damus gets to profit on diff on the exchange rate (minus apple cut) - Apple gets their cut - Apple requirements formally fulfilled