I think they'll just fine them, as per EU law.
Not sure how that is supposed to be undemocratic.
Putting on my cynical hat, I could imagine powerful interests using this opportunity to consolidate their power and silence their opposition under the guide of "prevention mis/dis/malinformation" - it's a slippery slope which is easy to abuse if not careful in our approach. This is what I meant by "so much for democracy". I very much hope I'm wrong :)
A powerful monopoly can do the same thing, and you don’t get to vote on their board. Why is that any less dangerous?
Yikes... so much for democracy.
Given that twitter has a large presence in EU, leaving doesn't seem viable so they will probably pay the fine.