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.