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Foursquare reportedly did not pay for the ad space. That means American Eagle is open to promote multiple location services; it's also one of the retailers using Shopkick, a location-based rewards service.
It seems like just a short time ago that these location services were only used by a few hardcore web tech geeks. Now they're so mainstream that they're taking up a chunk of the New York skyline. Did you see that coming? If so, you've been ahead of the curve.
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