Perhaps in the sense that they have a session cookie that tracks impressions of sites which reference them on the web, and that information they have that their users uploaded that happen to also reference you.

But not anything like in the sense of a logged in user and the level of knowledge they have about actual users.

Facebook knows a lot less about non-registered users than Google does, for instance.

And in the sense of the Cambridge Analytica scandal, which is what this fine is about, my understanding is that non-users were entirely unaffected.