I need to take a closer look at this. We don't do it but in these troubled times, young family et cetera... is it worth it?

They can just link purchases to the card I use to pay anyway right?

Having a quick look at my nearest grocery store, it looks like they give me 10% off one shop each month, amongst a plethora of other bullshit perks like points towards fancy cookware or something.

If I shop once a week and spend $200 then that's $20 a month or $240 a year. Essentially one free shop a year.

Not much of a saving really. There's other simpler things I can do to save more money I think.