I doubt many end users care about this, but there are businesses out there that are simply not offering their services on IOS because they can't justify passing

I doubt many end users care about this, but there are businesses out there that are simply not offering their services on IOS because they can't justify passing a 30% markup to their customers, and they run on thinner margins than that themselves, so they'd go broke eating it. An example is bandcamp, which takes a 10-15% cut. Saying "sorry, everything is 30% more expensive on iphones" is a nonstarter, and so is keeping the prices the same. So they simply don't sell you music if you're in the ios app. I believe apple will even reject your app if you dare to provide a web link where the purchase can be made in the browser.