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Do stores use bank account info to analyze shopping patterns? (mander.xyz)

submitted 3 months ago* (last edited 3 months ago) by [email protected] to c/[email protected]

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Out of a reflex of distrust, I refuse to participate in any kind of loyalty program of the outlet of the large retail store around the corner.

I tell myself that by refusing to join the loyalty program (which basically comes down to scanning an anonymous loyalty card every time I make a purchase), I prevent them from adding my correlations (what products I buy, in what combos, at what time) to their data.

But since I normally pay by card, I guess they can (and do) already do that with my bank account information?

If I would pay with cash, they can still see those correlations per purchase, but they can't track my purchases over time?

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[–] med 1 points 3 months ago (1 children)

How does that work for broadcasts from your device, designed to prompt beacons from dorman aps you might have joined before? Once you join it provides a random mac, but before then?

[–] [email protected] 6 points 3 months ago

They use randomized MACs there too.

You can set MACs to not randomize for specific WiFi, but by default it's on and random.