This kind information (and a lot more) is effectively public already via KDP Pricing Support (Beta): https://kdp.amazon.com/help?topicId=A22DBITFA52H1S https:/

This kind information (and a lot more) is effectively public already via KDP Pricing Support (Beta): https://kdp.amazon.com/help?topicId=A22DBITFA52H1S https://kdp.amazon.com/help?topicId=A22DBITFA52H1S I imagine there's some sort of non-disclosure agreement attached to specific results (which is why I said effectively), but the universe of people that have access is so large (every KDP author), I don't think that matters much in practice - especially for general data points like this one.