Modern societies and subgroups
Modern societies are becoming more like groups in Facebook. Let us has a close look at one famous author of a TV show about cars - Drivetube 
The only currency one has to pay is attention, by letting in your world their world of fast cars etc. Also, the profile with an email address is to be shared in exchange to get the fresh news, updates, testing cars.
If we take closer to the research of Dr. M. Kosinski, our data can be more informative than our family. Such kind of information and campaigned that gather data about users are only tools in knowing clients better to sell them a 'better' service or product or to 'suggest' it.