Stores more and more frequently offer better prices to customers who obtain one of their "membership" cards. Obviously such cards can be used to identify the shopper, collect data based on their purchase habits, and obviously be of great use to the company in determining prices, sales, and inventory. Even if you don't associate your real identity with the card, the company can still use the data to know what items are purchased together and with what frequency, etc.

The question is, do these stores purposely use such data to go beyond simple market research and instead use the information in ways that are detrimental to the customer?

I am skeptical of the need for these cards because most of the data they need can be simply obtained from their own cash register. The only information you gather with the card that you cannot without, is the association of separate purchasing events. In other words, if I pay cash for Armadillo Food in one shopping trip, and cash for canned tuna in another, the store has no real way to know that those two items were obtained by the same person.

So why do more companies feel that such cards are needed? I don't believe that the discounts are real, but rather prices are inflated for customers without cards, thus making the card a benefit only in allowing the customer access to the normal price.

1 Answer 1


Supermarkets get the following benefits from loyalty cards (that's the correct marketing name):

  • Obtain much more accurate information than they can gather from the cash register (these cards aggregate data when you pay without a credit card, or across family members). This information is used to measure ROI on marketing campaigns and therefore to tailor marketing to the real household demographic of a particular supermarket.

  • Obtain loyalty - they encourage the same household to always use the same supermarket chain. The biggest benefit of this is that supermarket chains feel the effects of competition much less and tend to be able to use monopolistic-like practices, like raising the price of a few items, knowing that people will still be loyal.

  • Enable other in-store policies, like self-scanning trolleys.

  • Differentiate the offer: it's much easier to launch a DYI store when you own a supermarket if you have direct access to your customers and can offer them points on their supermarket loyalty card.

What do they give in return?

  • Around 1% discount on average, which obviously is not real money - you need to buy even more stuff at the supermarket to get it.

The above statements can be easily verified on this Maxmiles brochure. Maxmiles had 3.5M card owners in 2007:

Maximiles Group is the European leader for online loyalty programs with over 3.5 million* members.

  • I'd also like to add when you sign up for one of these cards they ask you a whole bunch of questions like age, employment type, gender and address.
    – going
    Aug 7, 2012 at 4:49

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .