I think this sums up the defining economic growth story of our generation. Business models are being built around the loss of privacy, the exchange of privacy for convenience and free services. Note that this is only a concern when there is an understanding by the user that their actions are private by default: Google searches, Facebook posts to friends only, and everything in Gmail and Google Docs. This isn’t a concern when the user assumes publicness: Tumblr posts, Tweets, etc. Monetization can’t come from an exploitation of privacy when there is no privacy.