在reddit上面有看到外国乡民讨论
其实这个行为已经违反苹果的开发者指南3.1.2（a）
If you are changing your existing app to a subscription-based business model, yo
u should not take away the primary functionality existing users have already pai
d for. For example, let customers who have already purchased a “full game unloc
k” continue to access the full game after you introduce a subscription model fo
r new customers.
原始出处：
https://developer.apple.com/app-store/review/guidelines/#subscriptions
可以在这里向apple检举：
https://reportaproblem.apple.com/store/360593530/select/fraudulent
Reddit讨论串：
https://www.reddit.com/r/apple/comments/qkgt7g/notability_goes_free_with_subscri
ption_model/