reconx
Facebook has a tremendous amount of data about users, but for a B2B campaign, its quite terrible and worthless. Be sure you completely disable all mobile app "networks" placementd (esp facebook - audience network ) --unless you're doing managed placements -- I've seen tens of thousands burned with these networks, which show ads in worthless apps, designed to generate fraudulent clicks.
That said, retargeting across these networks (esp Facebook) can drive responses, although I can't say we've seen anything turn into a big opportunity later in the funnel (big/complex sales cycles)...retargeting requires traffic, so I'm constantly trying to pull in a variety of 3rd party/behavioural data to improve front end traffic, to get the right people to pages.
The ad model is unsustainable, I want BigCo to switch (they have the resources), but it's not easy for a global company.
It's like the Kardashians, they actively make an effort to be in the news for something, to maintain top of mind awareness...of their degeneracy.
Meanwhile for companies like FB, who mine every aspect of your life, the service is now valued at over $300Billion