I don't think that the American Congress is likely to side against donors and make walled gardens illegal any time soon.
The judge who ruled in Epic vs Apple did mention in the ruling that Epic could have had more success if they had focused on the size of the 30% cut instead of arguing that Apple could not take a cut from the App Store at all.
The judge who ruled in Epic vs Apple did mention in the ruling that Epic could have had more success if they had focused on the size of the 30% cut instead of arguing that Apple could not take a cut from the App Store at all.