Maybe ya. Though does grandpa (he's no better than her) go to Facebook to check in on Nissan or does he go to check in on her grandkids? Feels like the latter to me and Nissan is only on Facebook to advertise to her.
Facebook did / does well because its an easy way to spread your photos / updates to a (mostly) private set of vetted people. Everything else came for them to monetize people once they were there, I don't think many are super passionate about the Nissan facebook page, not even Nissan.