An advertiser, in the 2nd to last paragraph. I'm only assuming the facts in evidence -- that FB and Google aren't selling user data. They sell advertisements,

An advertiser, in the 2nd to last paragraph. I'm only assuming the facts in evidence -- that FB and Google aren't selling user data. They sell advertisements, which use user data for targeting via generally broad mechanisms or 1st party data. Re-reading my comment, I don't think I said anything about companies in general.