I doubt this is about direct revenue. This is about further cementing that "Facebook is The Internet" to as many people as possible. Facebook wants to know and

I doubt this is about direct revenue. This is about further cementing that "Facebook is The Internet" to as many people as possible. Facebook wants to know and control everything you do on your computer, on your mobile device, and on the internet at large. From all of that, they then earn the real revenue via advertisements.