There's already case law on these sorts of shenanigans: Midler v. Ford Motor Co., so Altman was either ignorant of this, in which case OpenAI needs new counsel, or he knew and did it anyway, because fuck you Scarlett Johannson. I'm pretty sure it's the latter.

https://gizmodo.com/openai-pausing-chatgpt-4o-scarlett-johansson-voice-1851488261

OpenAI Will Ditch ChatGPT's Scarlett Johansson-Like Voice: Report

ChatGPT-4o's "Sky" voice belongs to a different actress and is not meant to be an imitation, OpenAI said

Gizmodo
@scalzi for some reason it's making me think of how he controlled his sister Annie by locking up her inheritance. I suspect he has an ingrained notion that he can make troublesome women - or maybe just troublesome people in general - go away by throwing enough resources at them.