My app enables dancers to monetize their work. Dances can be accessed through the app and learned with the features that we build (slow a video down, audio instructions). The majority of the revenue goes to the dancer, as it is typical for 2-sided marketplaces, and the business takes a 10-20% cut. Currently, we use IAP and users pay to unlock per dance. However, our business model is not feasible with the app store taking 15% and then 30% of the revenue in the long run. Are there exceptions for 2-sided marketplaces where the app store fee is being deducted from the business revenue, and not the overall revenue? If we have people purchase a subscription or credits on our website, what can we do to heighten our chances of that being approved by apple? I know that reader apps are allowed to do that. The app should largely classify as a reader app, since the users access content through it, but we also offer some functionality (such as slowing down the video or using the camera), so I am worried that the app store is going to be difficult about this after we build the system.

I have an app on which users learn choreography. To avoid copyright infringements we currently only have audio instructions and no music on the app. Could we enable those that are subscribed to Apple Music to listen to the part of a song the corresponds to the choreography? Usually they are 60 seconds long. The app is in React Native. Would it be possible to implement it so that opening a dance video automatically triggers the playback of that song from e.g. second 32 - 95? Since the video is looping, could it then start playing from second 32 again? Also looking for devs with experience in integrating the MusicKit for this usecase if it turns out to be possible.