Well, foursquare is already using foot traffic to predict retail sales right now. https://medium.com/foursquare-direct/foursquare-predicts-chipotle-s-q1-sales-

Well, foursquare is already using foot traffic to predict retail sales right now. https://medium.com/foursquare-direct/foursquare-predicts-chipotle-s-q1-sales-down-nearly-30-foot-traffic-reveals-the-start-of-a-mixed-78515b2389af#.1c21c9lre https://medium.com/foursquare-direct/foursquare-predicts-chi...