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by fpgeek 4345 days ago
This kind information (and a lot more) is effectively public already via KDP Pricing Support (Beta):

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.