What about Barnes & Nobles? What about your local library? The difference is competition/choice.
I'm not even arguing about the 30% on the shop or even the existence of fees. Fees makes sense if they add something. They are well in their rights and it's fine that they do it in the app store.
What I'm arguing about is forcing them to use that as payment gateway IN the app. That's not value added, VISA does it for 2.5% (and less) already, Paypal too. That means that they directly remove choice to gains from you.
Buy a magazine over Amazon and see if inside there's an offer to subscribe using others means. Go on Uber on Android and check if you are forced to use Google Wallet.
> Apple probably gets called out the most because it's open to anyone, popular and it's fees are transparent but it's really the same across most digital platforms.
You are not calling out others, you didn't even named one in your comment. You are justifying their fees by the competition that does similar fees. You may want to change how you formulate your comment if your goal is really to call them out.
My point is that all of these digital platforms are taking a percentage that is in that range. Apple probably gets called out the most because it's open to anyone, popular and it's fees are transparent but it's really the same across most digital platforms. I'm not saying the percentage isn't high but Apple isn't an outlier when it comes to the fees.