Not sure if nostr:npub1yx6pjypd4r7qh2gysjhvjd9l2km6hnm4amdnjyjw3467fy05rf0qfp7kza saw this but while he hasn't accepted it yet, I want to make it 0.3XMR and add one more detail to the spec:
* Include a suggestion or requirement of using BIP-352 silent payments for any integrated tip wallets on coins other than Monero