Again. iOS is not a monopoly.

Having a monopoly over their own product is what every company has.

"iOS is not a monopoly."

I think the confusion here is that you incorrectly believe this is a necessary condition for Spotify's complaint to be upheld.

How so? I'm not very knowledgeable on antitrust law, but I do believe US regulators usually only take action on companies already having a monopoly.

This is a complaint to the EU...