"Pressure from advertisers" implies the advertisers are paying more than the marginal utility of the ads themselves in some kind of corporate-back-scratching model.
If the ads provide a ROI, then other advertisers will gladly jump on board.
If the ads provide a ROI, then other advertisers will gladly jump on board.
But even in the case they decide to jump ship, other companies will fill the gap. Do you think all the NFL players are going to leave the platform? All the sports journalists? No amount of internet outrage is going to change them, they're too stuck on the platform.
E.g. Musk said in the past he will draw the line at legal speech. Assume that Ye (Kanye) posts his early morning rant next week, and it is critical of several groups of people based on religion or race. That speech is legal, but highly problematic, is Musk owning Twitter going to make a difference in the way Ye’s problematic speech is handled in the future, I think not.