[madeofpalk]

There's two things in response to this:

Apple accrues benefit from having Spotify in the App Store because it makes iPhones better. An iPhone with no apps is less useful than an Android phone with many apps. This should be a win/win scenario where both parties get value from the platform (they do!)

Also - Apple is welcome to just charge a fee for the costs they feel appropriate for the development platform and App Store distribution. However, that fee (one-off R&D, and per-download bandwidth) seems pretty marginal. I wish Apple had the guts to actually charge everyone to Core Technology Fee (50 euro cents per download), rather than requiring EU developers to opt into it https://developer.apple.com/support/core-technology-fee/