Turns out I think THIS IS THE LEGIT ONE. It just seems they went out of their way to make it look like a scam. I noticed after a few minutes there's a tiny little link you can click to get a paper check for $0.13 sent to you.
I just now this morning had a notification in my actual Facebook notifications, leading to an actual facebook.com modal I had never seen anything like, which then linked to facebookuserprivacysettlement.com
So it would seem to be the legit one.