Your grocery store’s loyalty app is a great tool for clipping coupons and for getting personalized deals. It is also a powerful surveillance tool. The app is designed to collect a huge amount of data about every single purchase you make. While the store uses this data for its own marketing, that is not where the story ends. The grocery chain will often sell this data to third-party companies known as data brokers. This is a secret that is buried deep in the app’s terms and conditions.
