Between April and June 2020, the U.S. e-commerce market experienced record-breaking 44.4% growth — and it’s likely to continue to thrive as businesses large and small shift to online sales in the face of the pandemic. To make e-commerce work, platforms like Amazon need a rating and review system that helps consumers make these online purchasing decisions with confidence. But because these reviews are typically a significant factor in search rank algorithms and thus have a big impact on product visibility and sales, these systems often also create powerful incentives for sellers to manipulate their products’ rankings through fake reviews.