Nobody knows how Twitter under Musk will turn out. Some critics predict it will soon be a far right swamp no advertiser will want to have anything to do with. If they are right, Tesla’s association with Twitter stands to do it great harm. But if they are wrong, Tesla could benefit from its association with Twitter, much as it does from SpaceX. Musk is (surely) telling Tesla’s board and execs that having just paid billions for a firm, he isn’t about to alienate all its customers (the advertisers) - and the Tesla team is going to take his word for it.