I have a personal Facebook account and an account for the non-profit I run. Lately, I've been receiving a lot of panicked-sounding notifications from Facebook: "Your (number) followers haven't heard from you in a while! Make a post, tell them what you've been doing!" Or some blarg like that.

I would guess that Facebook execs are very in tune with the mass exodus. And in my opinion, it hasn't even begun in earnest. . . .yet.