I think he probably wants to rehab his image as far as clarifying his thoughts, or clearing up people's view of him as an antisemite. If that helps keep some advertisers, fine. Telling other prominent advertisers to GFY directly tells me he is unbothered by their input.
I saw early last year that twitter had 1.5B in debt servicing and 1.5B in expenses. Assuming they don't bring in a penny, that's 3B a year loss. He currently owns 423 Million shares of TSLA. At 244 a share, that's 103B at his disposal. I think he can ride it out if he really wants. From his remarks, it seems like he'd be open to that. He basically told the CEO of Disney that he couldn't money whip him, soooo.
I only watched the first 20 minutes, but I thought Sorkin did a good job. It was not what he expected. You also have to understand that Sorkin's baseline is kissing big wigs' asses on TV, so he was unlikely to flip on the spot at a big event.