Allowing them to use your data for LLM models? I'd say very few have it in their TOS.

Theoretically if they have a long enough post history, they can develop a virtual persona bot. That's a new wrinkle but I was actually talking with my wife about this several years back. 

It was the anniversary of her dad's passing and I said in the future some company would offer posthumous bots that have LLM'd email, social media, and other data sources so people could talk to their loved ones that have passed on. "Man, if I could only get advice from dad one more time..." type of shit. 

 Not LLM models specifically, just that anything you post they own. I thought Facebook had that for years in their TOS but I'm not sure about that.

Regarding the "dead loved ones bot", I remember someone made a service that offered such bots. I'm not sure if it was only a chatbot or with actual voice but that definitely exist already! 

 Nice, I was more thinking video as it would actually make the connection more real.