They do scan your emails for Amazon receipts so that they know what you purchase. That's why Amazon changed how they send receipts. https://www.cnbc.com/2019/0

They do scan your emails for Amazon receipts so that they know what you purchase. That's why Amazon changed how they send receipts. https://www.cnbc.com/2019/05/17/google-gmail-tracks-purchase-history-how-to-delete-it.html https://www.cnbc.com/2019/05/17/google-gmail-tracks-purchase...