> Investors are using real-time satellite images to predict retailers’ sales. Is that cheating? This is no more "cheating" than using any other pseudo-publicly

> Investors are using real-time satellite images to predict retailers’ sales. Is that cheating? This is no more "cheating" than using any other pseudo-publicly available sources of information, such as credit card purchase data, yelp/foursquare/FB checkins, or whatever. It's entirely legal in the same way sitting outside Macy's and counting the number of people who enter and leave through the public entrances.