It looks like twitter just cost Musk 1% more than he thought it would, and if he keeps applying American employment law to overseas workers it could cost him a lot more.
Musk ordered to pay X employee £470,000 for unfair dismissal 

the Guardian
Ex-Twitter worker wins £470,000 for unfair dismissal over Musk ‘hardcore’ email
Gary Rooney was told he had resigned voluntarily by not replying to the billionaire’s email about Twitter 2.0
