AI training?
There's a IT careers site that was sold, I believe, went through a re-branding. And now they also offer AI and "personal" resume reviews _and_ writing, cover letters, and they even have members do a 10-15 minute AI virtual interview that ostensibly could be shown to a hiring manager.
I was unemployed as a PM for about three month. I applied to in the order of 100 roles at this site, as well as applications on the other sites you'd expect, from LI to more niche.
I felt that this site was "underperforming". Jobs I'd applied to that I'd only really seen on there I'd never heard from. I saw jobs that were advertised in other places on there too.
What sealed it for me was that towards the end of the three months, I got an email from the site. "Your profile has been viewed". I open it, "An employer is looking at your profile". I'd never seen this type of email from them before, and sure enough: "Your profile has been viewed 1 time in the last 90 days". That was it. No contacts, and only one employer has even looked at my profile on the site (and this is the kind of site where that'd be the only place they could look at your application). And that employer didn't even have positions open.
But the site does ask you questions to "submit to the employer" about "why you want to work here" "why you'd make a good fit", etc.
And I'm entirely convinced that the jobs they're advertising are only (a very small) fractionally "real" and ever reviewed by anyone at all (maybe the "promoted" jobs?), and they're harvesting positions and jobs from other sites or employers (there's no positions that don't actually seem to exist, or at least not ads)...
... and that their chief motivation for this is getting all your answers to train their models for their actual revenue generator - AI resume writing, cover letter writing, etc. All pre-seeded with other people's real answers to such questions.