looks like you can just buy things in app with zaps now on iOS in the US. LFG
nostr:note1l8apznzep9uhz098n84rxa3suj2fexhuyddtz03n3uum96rwkuus5qekud
It means you're free to tell people they can purchase elsewhere for a lower fee you can include a link out to the web for them to do it there.
❤️3