Doesn't have to be that complicated. The DOJ announces an investigation into Twitter advertising practices. They get a friendly judge to issue some kind of injunction against showing ads for the duration of the investigation. No more revenue. Whether they actually find anything is irrelevant.
That probably won't happen though, this is really just about stirring up a frenzy of right-wingers so Twitter will have to bow down to them and give them more and more concessions in hopes that somehow, someday they'll stop accusing everything of being biased against them.
That probably won't happen though, this is really just about stirring up a frenzy of right-wingers so Twitter will have to bow down to them and give them more and more concessions in hopes that somehow, someday they'll stop accusing everything of being biased against them.