In fact they've been doing it for over a decade https://www.forbes.com/sites/kashmirhill/2012/02/16/how-target-figured-out-a-teen-girl-was-pregnant-before-her-

In fact they've been doing it for over a decade https://www.forbes.com/sites/kashmirhill/2012/02/16/how-target-figured-out-a-teen-girl-was-pregnant-before-her-father-did/ https://www.forbes.com/sites/kashmirhill/2012/02/16/how-targ...