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 "text": "Rating systems on centralized marketplaces are actively gamed: new Amazon sellers are solicited by sock puppet operators offering to inflate their ratings and attack competitors.",
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 "abstract": "For example, one of the first things that will hap- pen if you open a shop on Amazon is that you will receive several messages from ma- licious sock-puppet wranglers offering to game the rating system to improve your company's ratings while attacking your major competitor.",
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