I don't and have never opened a Facebook account... but I've very little doubt that Facebook knows me as a 'shadow profile' reported by the friends and family that have tagged me without my permission in many photos.

THAT should be something that an individual can sue Facebook over.

That's besides the point of the original comment though. I'd assume even if they know stuff about you they can't make money off of you since you're not watching ads.

Demographics information can still be monetized. It's not as valuable as being able to show you targeted ads, but it's not worthless either.

Ah, true I guess. Good point.

As far as I know, you can’t tag a non-member.

Yes you can, up to end of 2017 when I deleted my account. You just fill in a name in the tag field and it displays the tag as text, instead of a link to a profile.

You hope...