I think this is a great question. Stocks and NFTs are largely the same in my eyes - but I can't imagine Fidelity even bothering with an iPhone app if they lost 30% of each transaction people make (unless it was solely on the fees - I'm not sure where Apple draws the lines).

Also - does Apple take 30% from each Amazon purchase? I overwhelmingly just use the Amazon app for purchasing - I can't imagine the amount of money Apple makes from Amazon alone, if so.

No, physical goods are exempted.

Ah, that makes sense - why Kindle + Audible purchases have to be made on the web.

No because investments are not digital goods. Just because something is not physical does not mean it is digital. For example, a right to mine iron is not a physical thing, nor is it a digital thing; instead it is a legal thing.

It’s only for digital goods

If Fidelity sold you app skins and customization features they’d have to pay