On Amazon, customer comments can help a product surge in popularity. The online retail giant says that more than 99 percent of its reviews are legitimate because they are written by real shoppers who aren’t paid for them. But a Washington Post examination found that for some popular product categories, such as Bluetooth headphones and speakers, the vast majority of reviews appear to violate Amazon’s prohibition on paid reviews. Such reviews have certain characteristics, such as repetitive wording that people probably cut and paste in. Many of these fraudulent reviews originate on Facebook, where sellers seek shoppers on dozens of networks to give glowing feedback in exchange for money or other compensation. The practice artificially inflates the ranking of thousands of products, experts say, misleading consumers. Get the full story at The Washington Post