Twitter can find an excuse to ban his account (you can easily imagine this sort of risk exists after some of his recent meme tweets for example). I believe that is a single point of failure in Tesla PR strategy and a risk to be mitigated.
> brand name's risk profile increased
Risk profile sure but has the net value decreased or increased due to his presidency? I don’t have data to say it’s one way or another but looking at the downside without the upside as well is futile.