Musk has to know (and if he doesn't then Linda Yaccarino surely does) that advertisers have no interest in "blackmailing" him to do anything with the former Twitter. The platform is an afterthought for ad dollars in the first place and won't be missed when the money moves to more effective platforms. He's perfectly within his rights as an owner to make the former Twitter scorched earth for major advertisers. They'll just... stop advertising there. Zuck says thanks!