He drives a lot of traffic to their site
I disagree. Given that many of those folks have not only continued to engage with the soon-to-be ex-POTUS, even to the extent that they are happy to be suckers...err......donors to his grift[0]...err.."Election Defense Fund", I'd think that Twitter would want to keep those folks around -- the more gullible someone is, the more likely they'll click on ads and generate revenue.
And advertisers stand to make money on conversions, assuming those folks haven't already given all their money to the Trump "Election Defense" con...err...fundraising drive.
[0] https://www.reuters.com/article/us-usa-election-trump-fundra...