In the US, highways are almost all free but ”payment” is roughed charged through gasoline taxes. You also pay for sewage service based on how much water you use, not how much sewage you produce, based on the assumption that most of your water goes into the sewer.

Charging customers by some other correlated proxy is not robbery; it’s just practical. Which is exactly why the court had no issues with the arrangement.

The issue isn’t how Apple bills for their services, but rather whether they should be allowed to force every app developer to even consume them, at least to the extent they currently do.

Given that this is the US legal/political system, that question is being fought out in various proxy fights, but by looking at the largely equivalent situation in the EU and the DMA, you can see what’s really at stake here.