In the one case, it's just a lightning wallet without any specific intention for what you should use it for. Alby Go has no intrinsic connection to your Nostr feed. You COULD be using it to zap people in a completely separate application that Apple has no authority over because it's not in their app store, or you could be using it to buy soap from @npub1zzmx...w5wy 's website. In the case of a Nostr client, where you have a feed of notes that each have a zap button. Connecting a wallet via Nostr Wallet Connect has the very clear intention of using it to zap that digital content. Well, now Apple is going to want their 35% cut out of those "digital purchases," even though we aren't purchasing anything. Primal met their demands by allowing users to purchase a small amount of sats directly within the app, with Apple getting their cut from those transactions. Thus Primal was allowed to include zapping of notes without any work-around needed, while Damus had to leave zapping of notes out of their app and create a work-around to activate it after installation. Defaults are important though, and one of the most common questions from Damus users in the AskNostr hashtag is, "How come I can't zap people's notes and can only zap their profile?"