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Why do supermarkets have loyalty cards? (feddit.uk)

submitted 6 days ago by pottery@feddit.uk to c/askuk@feddit.uk

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Can't they just track everything you buy using your payment card?

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[–] zweieuro@lemmy.world 2 points 6 days ago (1 children)

You could have multiple cards; idk how it works for the US but maybe they cant see the card owner? So if a loyalty card is used with two credit cards it is useful to know it's most likly the same family or even the same person?

Wild speculation

[–] Dultas@lemmy.world 1 points 5 days ago

Even if they can see the owners name it's not like they're unique. Although doing simple correlation wouldn't be that difficult.