▲ 24 ▼ Why do supermarkets have loyalty cards? (feddit.uk) submitted 1 month ago by pottery@feddit.uk to c/askuk@feddit.uk 23 comments fedilink hide all child comments Can't they just track everything you buy using your payment card?
[–] HubertManne@piefed.social 0 points 1 month ago in the us there was a service which did this but it never took off. permalink fedilink source