Your data is so precious that stores will stop at nothing to get it from you. Including offering you free things, discounts, sweepstakes, and all kinds of "perks." Just become one of the "club," collect "points," be a "VIP," grab a card for CVS, Shoprite, Wegmans, and watch the cents come off at the till! Those perks sure seem great, but they are gateways to tracing your purchases at an ever more fine-grained level.

Sister post: https://www.optoutproject.net/how-to-shop-untraceably-online/