Language learning app Duolingo has apparently been using the iPhone's Live Activity feature to display ads on the Lock Screen and the Dynamic Island, which violates Apple's design guidelines. According to multiple reports on Reddit, the Duolingo app has been displaying an ad for a "Super offer," which is Duolingo's paid subscription option. Apple's guidelines for Live Activity state that the feature cannot be used to display ads or promotions.
Agreed, but they won’t. They have a bunch of rules like this and they’re happy to go after small developers who don’t contribute much beyond their annual fees, but big developers who bring in money? They tend to look the other way a lot of the time.