How is this different from Foursquare's checking in for discounts? In the very brief period that I toyed with that app (I failed to find any use for it), I cou

How is this different from Foursquare's checking in for discounts? In the very brief period that I toyed with that app (I failed to find any use for it), I could never find a deal. Maybe Facebook will be better at snagging them?