This week we take a different look at Facebook. How they - and other "free" social media sites - make money using your information.How do these sites manage to make money? The sheer scale of development costs and supporting a large user base is expensive. The one element that all of these services have in common is the uniform requirement of personal data; while this data is used to identify you, it’s also used as collateral to be sold to advertisers and other interested parties.