You think Facebook is free? Well, it'll only cost you your private life

Lured by "free" services on the internet, we click through to a digital emporium where we sacrifice our privacy. Every click, message and electronic trail is mined for profit. Every digital stroke makes money for them. The more time that you spend, the more money they make. There is little they don't know, almost nowhere they can't follow and nothing they can't tell about your digital life.

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 You think Facebook is free? Well, it'll only cost you your private life | Observer editorial | Comment is free | The Observer: