I disagree with this, or at least the implication that there should have been more information gathered before publication.
If the data is surprising against a common-sense set of expectations, it's Amazon's burden to provide a context for interpretation where the surprising information makes sense, not the report.
Assuming the report's facts are in order, reporting accurate facts and leaving "contextualization" to someone else is good journalism, especially if the facts themselves are not widely known or actively hidden.