To make you spend as much money as possible, supermarkets use all stuff, including loyalty cards .
Once your loyalty card in hand, you're going to want to rack up as many points as possible to qualify for discounts or freebies.
Bad luck, the products that earn the most points are often the least interesting, even the most expensive! So the trick is to avoid loyalty cards .
If you're willing to follow your shopping list rigorously, without worrying about which items earn the most points, then you can take a loyalty card to earn points on items you would have purchased anyway.
loyalty cards are in most cases marketing tricks to get you to spend more than you expected, not to save.
The point system allows the supermarket to attract you to products that earn you more points but cost more than the products you intended to buy.
It's very vicious as a trick but it works and if you're not a clever stingy, it's easy to be tempted...
Also take a look at the number of points incredible that you have to reach to be rewarded with an interest-free gift or a voucher for a few euros valid only on a useless product!
