All signups are good. Loyalty to a brand is certainly very valuable and loyalty cards offering discounts is a way to build that brand. It's a piece to the puzzle and IMO rarely by itself will build much loyalty, unless it is a fantastic deal. But if it is combined with already 'good feelings' about a place due to how well they treat you or how much you like their products, I can see how it could add to the loyalty that already exists. It may well be that KT is that special kind of business that this can work with because of already-existing loyalty. My initial take was 'no way-- it's simply a convenience story'. I see though that they may be a bit different than the typical convenience story. We'll see what happens.
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