We are drowning in irrelevant advertising. Some are inspired by it, most ignore it, some would like to get more relevant ad messages.
I have been convinced for a while now that selling user data is one of the most direct and potentially lucrative ways social networks can achieve the kind of revenues that would justify their valuations. A recent article on Facebook’s intention to “cash in” on user data reminded me of a recent conversation.
In just two years (the 2008 edition is its third one), the 










