A brief thought about Google's AdSense.
Given the latest news about Sparrow being bought by no other than the big GOOG themselves, there's been a stirring amount of commenting stravaganza against it with delitghtful insights as "I don't like Google using my personal data to point ads towards me"
Let me try to say this briefly: Google uses your data to serve you ads instead of making you pay for their (arguably) awesome products. Cable operators serve you ads even when you have paid for their content already and they use your location, target demographics and other metadata to do so as well, in such a way that totally ruins the experience.
Stop complaining. There are things much worse than getting ads on a web-app that you may ignore anyway.