Tesla doesn't own X/Twitter though. Elon does. If I were a Tesla shareholder, I'd be mildly[0] irritated that Elon feels it's OK to take money out of "our" company to spend it on "his" company, even if there is some nominal benefit.
[0] the amounts are so tiny, I wouldn't really care. I'd be more angry that he thinks he can reasonably function as a full-time CEO for Tesla while gallivanting about with his other ventures.