They are giving it back when your done with it!!!
Some supermarkets here in Westchester, NY as well.
Oh, and it doesn’t really “cost” you, the coin comes back out when you bring the cart back; that’s why they do it, to stop people stealing them or just leaving them wherever like a lazy fucker
You get the money back when you return the shopping cart. So you don’t so much pay to use it as you rent it for the duration of shopping. I know this to be true as I am Canadian.
It’s like that at some supermarkets in the US, like Aldi. They also don’t offer bags (so you have to bring your own) and have a massively smaller selection of items as opposed to a standard supermarket—all to control costs/savings.