Developers can use their own payment systems, and MS take nothing. That's a bit of a kick in the teeth to Apple.
Absolutely. Microsoft doesn't have a large existing Windows Store business to protect, so why not make Apple's life harder? I think it's also the solution that best meets the reality of apps in 2021. Big third-party devs like Netflix and Amazon will opt out of in-app purchase entirely before giving a cut to the platform owner. May as well let them use their own payment system so users get a better experience than sig…
These big OS/device companies in fact compete with them with unfair advantages like pre installed apps, prominent product placement on AppStore and closed/early integrations.