Feels like one SpaceX could and should deal with by DMCAing the channels. Even if getting people watching their official channel instead isn't that important to them, stopping people rebroadcasting their content whilst faking their brand identity to scam people feels like the most legitimate reason for sending takedowns going...
The channels are usually with stolen credentials. i.e. when you see an Elon Musk stream on your home page, it's because a creator you Subscribe to had their channel taken over and the content replaced with fake Musk streams.
They make new ones each time. By the time the stream is over, they’ve already promoted their shitcoins and don’t care what happens to the channel.