That's simply not how hiring works at most institutions.
For high traffic lower level positions, hiring managers resent getting given these AI tools. You wind up with candidates that are best at manipulating AI, not the most qualified. Their previous method, basic sorting and hitting the first acceptable worker (rather than the absolute best), is much more efficient use of their time.
For higher level positions, networking plays a much more significant roll. Since it's a much more significant decision, companies are also less likely to entrust it to an AI.
Screening out unserious applicants is easier than you think, and can be addressed without a blackbox of potential lawsuits
My most depraved marketing brain thinks borrowing the visual language of Reddit gold would be a good idea. At least in comments.
Partly because it's familiar to most users, but it also draws your attention and highlights well liked posts.
And if someone is boosting a comment, I think that's much more significant than boosting the main post, which is already meant to be shared.