Quote Originally Posted by jn1780 View Post
More security at Costco than the TSA. Photo ID and card to enter the building, Another card scan just to pay for your items, A receipt lookup and confirmation at the exit. And your paying a premium just to be part of the club which is another form of security. Can they at least drop the scan needed at the register?
The scan of your card at the register allows them to track your purchases, which makes returning items without a receipt a breeze. It also allows you to have a digital receipt in your Costco account, which also makes it easier for you to compare prices throughout the year.

Indirectly, they probably also look at what you buy to send you emails that target certain items.