well I guess
Google do all they do off the back of billions of ad dollars (it seems so hard to believe, I mean who actually clicks Google ads, apart from no one?), so Facebook is just crazy enough to work.
People will go to google, search for facebook, click some ads, then go back to google and search facebook again, click some more ads, then go back to google (third time lucky), search for facebook, click the facebook link, then go on facebook and click some ads.
It's a fate worse than death, but if these people with, shall we say, "special digital needs", are injecting ad money into the IT industry then long may it live. The bandwidth it takes to deliver 1 high def Youtube video to me probably cost about a thousands ad clicks that some loser had to sit in his house doing all day, while I just block the adverts. I feel great, Google is coining it in, and an underclass of suboids is clicking adverts sunrise to sunset. Celebrate good times.