"Harvested and processed to add cohort tags to include in advertisement real-time bidding contests so advertisers can know how much to bid", while more precise, isn't as punchy as "harvested and sold".
I've been confused about this for a while. Given data is what allows them a unique advantage for their advertising product, it seemed odd that Facebook would sell that data to others.
But to hear people talk, a company could literally buy personal information from Facebook.
Does someone own the Wikipedia page about them?! No, Wikipedia does.