They can guess where you’re going because they know where you’ve been. The apps, browsers, and social media platforms you use constantly collect data about your habits and locations (in real life and online), which is then sold to the highest bidder. In return, you get free services like Facebook and Gmail. Is that a fair deal? Some say no, but it’s perfectly legal…for now. Learn more about the dark secrets of THE DATA TRADE in our latest Instaread original.