The trick is that most people think they are getting a good deal out of Facebook; we think of Facebook to be “free,” and, as marketing professors explain, “consumers overreact to free.” Most people don’t feel like they are actually paying when the payment is personal data and when there is no specific sensation of having handed anything over. If you give each of your friends a hundred dollars, you might be out of money and will have a harder time buying dinner. But you can hand over your personal details or photos to one hundred merchants without feeling any poorer.So what does it really mean, then, to pay with data? Something subtler is going on than with the more traditional means of payment. Jaron Lanier, the author of “Who Owns the Future,” sees our personal data not unlike labor—you don’t lose by giving it away, but if you don’t get anything back you’re not receiving what you deserve. Information, he points out, is inherently valuable. When billions of people hand data over to just a few companies, the effect is a giant wealth transfer from the many to the few. —The New Yorker