I would assume they owed whatever ethical duties they owed to Twitter in the sense of the shareholders selling to Musk, and I threw out $20 billion as a wild-ass guess of how much he was paying above fair value at that point in time. They got paid ASAP because they're savvy.
And I assume Musk is having a fit of pique and the legal arguments make no more sense than the stuff about the "bot problem". He didn't own the company before he owned it, and usually you acquire the debts of a company you buy, right?
But I'm an expert in none of it. I just expect more of the same from a person with an established routine.
(By the way, a $100 bill - the largest US currency these days - is said to weigh about 1 gram, meaning that $100 x 454 grams/lb x 2000 lbs/ton = $90,800,000. $90 million, in other words, is literally a ton of money...but $20 billion is more like 220 tons of money - ChatGPT claims that is the weight of a blue whale, a Boeing 747, or an M1 Abrams tank)