It appears what really ended their little scam was the $421 million of reported revenue based on complete lies.

Because lying to investors about product hasn't been really an issue lately, even Intel ~5 years ago did some presentations that were a complete fantasy back when they were desperate to keep their stock value but could not produce a chip smaller than 14nm.

If they prosecute CEOs based on lies to investors other than accounting, almost all AI startups would go down.

CEOs can say basically anything when it's talking about the future. They just have to include a safe harbor disclaimer about forward-looking statements.