Apple has reversed course and is now demanding a 30% cut of donations sent to teachers in the popular Insight Timer meditation app. The change apparently comes after Apple allowed the app to use its own Stripe-based in-app purchase system for over a year. As detailed in a report from TechCrunch, Insight Timer’s allows it users to send “tips” to their favorite teachers and instructors. In its App Store Guidelines, Apple has specific rules about this: Apps may enable individual users to give a mon...