Maybe more of a deal is that this is the first step in the legal battle. Now Facebook can appeal or ignore but that opens up to get a court injunction all the way up to the european courts until you get a decision on the highest level. Without a first injunction, none of that would be possible.

That is only their first fine. If German law is similar to Swedish law here nothing prevents future fines if FB just chose to ignore the ruling and pay the fine.