>The primary focus of those supermarket cards is targeted marketing. It hit me last week just how much the Kroger chain knows about my buying habits in exchange for giving me those discounts.

Kroger's is the store in my earlier post. I've heard their marketing dribble and I don't buy any of it. I can get discounts at other stores without them knowing anything about me.

>
>Every time I check out I get a printed-on-demand store coupon, usually for something I just bought in that batch of groceries.

I always get a coupon for a competing product for something I just bought.