App内課金の説明も明確に記述しなさい。
（訳注 AppStore Connectのリジェクト理由として、どこからApp内課金するの？と聞かれることがあります。この場合、Youtubeの動画リンクを付けるのが簡単でおすすめです。）
原文
2.3.2
If your app includes in-app purchases, make sure your app description, screenshots, and previews clearly indicate whether any featured items, levels, subscriptions, etc. require additional purchases.
If you decide to promote in-app purchases on the App Store, ensure that the in-app purchase Display Name, Screenshot and Description are appropriate for a public audience, that you follow the guidance found in Promoting Your In-App Purchases,
and that your app properly handles the SKPaymentTransactionObserver method so that customers can seamlessly complete the purchase when your app launches.