Amazon’s attempt to prevent review fraud appears to be foiled, as there has been a surge of fraudulent reviews on the site recently.
Within the last few months, many products have landed dozens of five-star reviews within hours or days of being initially merchandised. Some of these are concentrated among a small subset of Amazon’s reviewers .
Amazon’s ratings play a huge role in the visibility of the products, and fraud allows newer products to leapfrog legitimate merchandise.
Source: Amazon’s Fake Review Problem Is Now Worse Than Ever, Study Suggests