Or a company does this and sells the meta they learn for a monthly subscription (because as they update this on the company side the meta will change).

I think those are called career coaches.

They don't actually do this I believe, but they totally should. Canary various strategies and see which pay off.

I saw something similar happening at one of my past jobs. The resumes were not necessarily AI-generated, but contained, in their "previous jobs" sections, a lot of copy-paste from online course descriptions where duties and achievements would go. This was caught because of two resumes with one sentence repeated verbatim.