I am working on an app that has a auto-renewable subscription that gives users 200 tokens to use in the app each month. I have written a firebase cloud function to verify the receipt with apple and give the user the first 200 tokens on initial purchase, but I don't know how to continue to give the users a fixed amount of 200 tokens each month if their subscription is still valid. Could I store the receipt from the initial purchase of the subscription on my servers and use a monthly recurring firebase cloud function that checks the user's receipt from their initial purchase of the subscription to see if it's valid? Do old receipts tell you if a subscription is still valid like that? I also looked into Server to Server notifications but I am not very sure if the automatic renewal of a subscription gets sent as an event.

I am planning out an app that will allow users to earn points by using it and when they get to say, 10,000 points, they can trade it for a badge, and within 48 hours of them trading points, I as the developer will be notified and donate say, 1 dollar to a tree planting organization. The app will also offer an auto renewable subscription that allows users to earn double the points each day. The user does not actually use their own money to make donations. Is that allowed?

My app recently got rejected from the App Store because of the following reason: Require that users agree to terms (EULA) and these terms must make it clear that there is no tolerance for objectionable content or abusive users I am just wondering, If I choose to use my own custom EULA in App Store connect, will the standard EULA still apply or do I also have to include apple's standard EULA in my custom EULA?