The Wall Street Journal reported that the project started in 2015 as a way to compare the experiences of third-party sellers on Amazon to those of e-commerce rivals and quickly morphed into a means of spying on those rivals, especially Walmart. Big River bought merchandise and sold it on Best Buy $BBY, Overstock, and Walmart and stored its inventory with Fedex, UPS, and other logistics services that rival its own, according to the report. Amazon employees on the Big River team were told to take pictures or screenshots of competitors’ pricing, cataloging, and advertising systems, and they were sent to rivals’ conferences, where they obtained “exclusive” information, The Journal reported.