Look closely. Amazon claimed they don't access individual seller data, but they do access aggregated product data.
However, in at least one case the aggregated data was only between two sellers: Amazon Warehouse (which only sold a few returned items) and the original seller.
"Amazon draws a distinction between the data of an individual third-party seller and what it calls aggregated data, which it defines as the data of products with two or more sellers."
However, in at least one case the aggregated data was only between two sellers: Amazon Warehouse (which only sold a few returned items) and the original seller.
"Amazon draws a distinction between the data of an individual third-party seller and what it calls aggregated data, which it defines as the data of products with two or more sellers."
https://www.wsj.com/articles/amazon-scooped-up-data-from-its...