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Re:Dominance of Apple and Google’s app stores impacting comp... by Spivak on Wednesday April 28, 2021 @01:18PM (#26971799)
You're ignoring opportunity cost which was the whole point here. You didn't say how much Apple was getting.

If Spotify charges $10 and pays Apple $3 then Spotify makes $7 and Apple makes $3.

If Apple enters the market and charges $10 then consider a user that would have otherwise went to Spotify. Spotify makes $0 and Apple makes $10 from the subscription but loses $3 from what they would have been paid from Spotify so Apple makes $7.

Apple has lots of advantages stemming from their control of the platform but "not having to pay the 30% fee" isn't one of them.

Re:Dominance of Apple and Google’s app stores impacting comp... by fossuser on Wednesday April 28, 2021 @01:33PM (#26971983)
Apple gets $10 or $3 from a user

Spotify gets $7 or $0 from a user

How is this not an advantage?