This is a new development from Apple. As most IAPs are automatically installed after purchase, you’re basically signing away your right to a refund if you make a mistake.

Apple has also started applying the same limitations to some macOS applications in the Mac App Store too, i.e. you have to ‘agree’ to waive your right to a refund before you can complete the purchase as the download is automatic.

Is this even legal?

On my other site…