In a video on her consumer watchdog YouTube channel Fake Review Watch, Dean, a former federal criminal investigator, explains that she became leery of the dental practice when she spotted that 195 of its 202 Facebook reviews were posted over just three days in May. Previously, the clinic had gone years with only a handful of reviews.
In February 2021, U.K. consumer advocacy group Which? published an investigation into how fake reviews for products available on Amazon Marketplace were being sold online in bulk. It found that companies set up for the sole purpose of flooding Amazon sellers' product listings with phony praise were fueling a huge global industry of coordinated online reviews. German company AMZTigers, for instance, was reportedly advertising bulk packages of up to 1,000 reviews for prices close to $10,000. Amazon attempted to crack down on fraudulent sellers later that year and suspended multiple high-profile sellers for using banned techniques to get reviews.