At least some of this is coming to light:
> Doublespeed, a startup backed by Andreessen Horowitz (a16z) that uses a phone
> farm to manage at least hundreds of AI-generated social media accounts and
> promote products has been hacked. The hack reveals what products the
> AI-generated accounts are promoting, often without the required disclosure
> that these are advertisements, and allowed the hacker to take control of more
> than 1,000 smartphones that power the company.
>
> The hacker, who asked for anonymity because he feared retaliation from the
> company, said he reported the vulnerability to Doublespeed on October 31. At
> the time of writing, the hacker said he still has access to the company’s
> backend, including the phone farm itself. ...