ha. this is smart by fb. if they follow the yahoo model, access to that data is sold to the agencies that want it. they don't get access for free. so fb has

ha. this is smart by fb. if they follow the yahoo model, access to that data is sold to the agencies that want it. they don't get access for free. so fb has an interest in having a nice store of data on offer. it's a nice business unit on its own in addition to their ad selling pursuits.