It's not clear from the Twitter thread what Apple is asking for. They're definitely NOT asking for a share of creator proceeds but they may be asking for Fanhou

It's not clear from the Twitter thread what Apple is asking for. They're definitely NOT asking for a share of creator proceeds but they may be asking for Fanhouse to have a way to subscribe in the app. I downloaded Fanhouse and tried to view some profiles. It says "Follow to see more" but there's no way to follow anyone in the iOS app. I can see this running afoul of some App Store guidelines since you're advertising a feature with no way to use it. This could be Apple being unreasonable, but it could also just be a misunderstanding of how the App Store review process works. I don't know how long they've been going back and forth with Apple on this.