Facebook makes most of its money on mobile ads which are not affected by ad blockers. So why make a big deal announcing efforts to block ad blockers? A smart company like Facebook doesn't make moves accidentally. This announcement is more targeted towards publishers than it is towards ad blockers. Doesn't matter how affective the work around is - it sends publishers, who are holding off from instant articles and more Facebook hosted content, the message Facebook is the only way out; You will lose the war against ad blockers; sign up with us for instant articles and other Facebook hosted solutions and we will fight with and for you.
http://qz.com/743988/facebook-is-an-unstoppable-force-on-mob...
> In the second quarter, mobile sales made up 84% of its $6.24 billion in advertising revenue