Friendly reminder that Barack Obama's campaign didn't hire an external firm to manipulate Google and Facebook - they had direct access to the companies, with Google even providing a team of engineers to work with the campaign in Washington.
FB and Google also provided teams to work with campaigns, as they would for any such huge advertiser. What they did not do is they did not provide the entire goddamn social graph like they did for Obama in 2012. Or at least they did not provide it to Trump. Hillary's campaign was so sure of itself, they did not utilize the help Google and FB provided them. I'm sure such things could be arranged under the table for the anointed candidate.