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Kind_Simian said: FWIW, you already have a pulpit and can do more to raise excitement (or sling feces) via your blog, podcast, etc., than any lost in a sea of user reviews on Amazon can accomplish anyhow. Baby with the bathwater? Sure, but that baby already has a 20' speedboat and a cooler full of beer.
Right or wrong, Amazon tries to automate nearly everything, and this rule lets them avoid making judgment calls someone with more than just a pulse would be required to make.