A less politically charged framing would be: The EU would, quite rightly, prevent Twitter from operating as a business in their jurisdiction due to their refus

A less politically charged framing would be: The EU would, quite rightly, prevent Twitter from operating as a business in their jurisdiction due to their refusal to conform to EU regulations. That would then prevent Twitter from charging customers in those geographies (whether those customers are advertisers or users). And given the EU economy is one of the largest in the world, that could seriously impede Twitter's revenue potential.