Amazon is filled with fake reviews and it's getting harder to spot them

Thousands of fake reviews have flooded Amazon, Walmart, eBay and others, as sales have skyrocketed.

Being "reviews" the one big metric customers have relied on to determine the quality and authenticity of a product. Amazon's listings often have a lot more of reviews, instead of the handful found on competing marketplaces.

In July, 2020 UCLA and USC released a study that found more than 20 fake review related Facebook groups with an average of 16,000 members. In more than 560 postings each day, sellers offered a refund or payment for a positive review.