First Google turned links into money. Now Facebook is turning likes into money.
To flesh that out: A decade ago, Google found a way to profit from the preferences each of us expressed as we coded links on every home page and blog post we published. Today, Facebook is aiming to profit from the preferences each of us express as we click "like" buttons and peruse the activity streams that Facebook assembles from that activity.
Last week, a front-page New York Times story sounded an alarm about a phenomenon Facebook veterans have known for some time: Facebook now transmutes personal messages into advertisements, and lets companies and individuals pay to highlight their posts on personal pages. Procter & Gamble can pay to tell us about its toothpaste; you and I can tell each other about our lives and loves. And each message has a price tag.