[coldtea]

>It seems like Apple have created a monopoly within their own ecosystem.

There's no such thing as a "monopoly within an ecosystem".

Either you cover the majority of the full market (not of your market), and you're a monopoly, or you don't.

If you don't, then within your own platforms, shops, and premises it can be your way or the highway.

Nobody has a right to tell you what to sell or not sell, and how much to charge for things in your own shop -- kind of like with a physical shop. It's not Apple wanting Spotify to be sold through their platform/store and asking them -- it's Spotify wanting to take part in Apple's marketplace.