Elon waived his right to due diligence when he first made the offer to buy Twitter, so backing out of the deal by arguing a lack of due diligence is very funny.
They’re not claiming a lack of sue diligence, they’re claiming fraud. Which is different. They’re saying they’re lying about the numbers. Which would be fraud.
But they've been sending the SEC these same numbers calculated using the same methodology since 2013, right? If they were materially adverse circumstances, you'd imagine that someone would have caught this in the last 9 years...