> Apple’s approach has always been to grow the pie.
Apple's approach has always been to grow it's own pie. They have never been even remotely interested in playing nicely with other companies. I don't fault them for it, but let's not kid ourselves here; the app store is largely an extremely profitable exercise in rent seeking.
It's not like this is new for Apple; they've had proprietary cables and adapters for as long as I can remember. Developing software for their hardware has always meant using Xcode, which, surprise, is not free. Literally every other platform has given away tooling and emulators, but that's never been true for Apple. Occasionally this kind of behavior works out well for customers -- they were unafraid to use their market power as a cudgel to kill off Flash (which I think we can all agree needed to happen) -- but all too frequently it's purely anti-competitive. Apple has created some incredible products and services over the years, but let's not kid ourselves about this; this is simply a way of extracting value from Spotify.