Apple has been facing more and more pushback over its corporate practices over the last few years now. That includes things like the App Store's associated fees, support for third-party payment options within Apple's digital storefront, and more. Most of that pressure has been coming from international government bodies, like South Korea, but Apple may see similar actions in the United States soon, too.
U.S. Department of Justice reportedly in early stages of drafting an antitrust suit against Apple