Give me your data.
"There is a saying in Silicon Valley that there is no such thing as a free app - if the app is free, then the individual using it is the product. In other words, today's Silicon Valley corporation views people as resources to be mined and exploited, not unlike, say, coal in the nineteenth century."
- Thomas E. Ricks
[Execupundit note: That's a clever saying but I don't really see the relationship as one of exploitation. People can have various reasons for - and benefits from - using a free app.]