When it comes to doing business, we don't expect any foul-play by big corporations like Facebook - but, that does not seems to be the case here. As you can see from the official pitch of facebook ads, these ads are supposed to be highly targeted and should result in engagement. However, this is not what advertisers are experiencing - as an example the "US Department of State" spent $630,000 to acquire 2 million likes to their Facebook page only to realize that only 2% of these were engaged. Advertisers are seeing that not only the "Likes" supplied are from fake profiles, but they are way off target even when opting for strict demographic boundaries to promote the content on. Do watch the excellent video posted below on what facebook is selling and what advertisers are getting.