Hot take, if you pay platforms like LinkedIn and X for your ads, they will turn a blind eye on the $63B a year ad fraud. Because they will lose billions. If you pay the "humans" directly there's no "conflict of interest". Companies get human attention, and humans get money for their time.
If you verify every human, to not be a bot, and to be reputable (e.g. employee at Google) vs. trusting LinkedIn to show your ads to those same people to want to target. The math is in the formers favor. Quality cannot be much more degraded than the current Pay-per-click solution of today, specially with LLMs crawling the web like never before.
If a human proved attention (via comprehension check, LLM detection, feedback etc.), compared to the alternative of just paying $5-$15 on LinkedIn for just a CLICK! The choice is a no-brainer.