To add to it,
Not META, but there are videos of small business owners explaining how amazon used their data to set up its own thing as their direct rivals, then manipulated their ratings, virtually stealing their clients too.
Tell them that selling their data to thurd parties is one of the biggest revenue streams of META, that you are NOT ok exposing your own business to such risks and that as a serious business, they should be wary of giving data to data selling / leasing social networks as well.
Thank you.