It’s not possible for them to keep targeting data to themselves. Targeted campaign products leak data about the user’s targeted attributes by their very nature

It’s not possible for them to keep targeting data to themselves. Targeted campaign products leak data about the user’s targeted attributes by their very nature. If you want FB’s targeting data, simply buy targeted campaigns and associate the target attributes with the users who click once they are on your server. At scale, the targeting data is transparent. Big ad analytics companies and ad exchanges can and do basically sit in the center of many campaigns and slurp up the targeting data which is naturally leaking from FB by virtue of their selling capaigns based on those targets. Whether they want to or not, they are selling their data. Edit: Care to reply instead of downvote? Is everything above not true?