As with many financial market things, Matt Levine’s summaries are great on this. Twitter has been reporting these numbers for many, many years now. The public market has accepted them for many, many years. Elon has been complaining about the bots for maybe as long.
So nothing has changed between Musk making the binding offer and today with regards to bots. He has not suddenly been surprised about some discovery. This is not something that materially changes what he thought Twitter was worth. It’s just another game to distract people.