So the ad review system is just requesting the ad from the advertiser, and not ever bothering to disguise itself? Didn't we have this shit figured out for brick-and-mortar restaurant reviews decades ago?

As far as I understood, the problem happens when the ad has a link to a website. I can't imagine that happening with static images or videos that don't link a website (that could be solved quite trivially...)

You can change the link target, but you cannot change the media afterwards without a new check.

That's called a broken system and implies either incompetence or malicious intent by the ad platform.

The fact the ad platforms are multi-billion dollar companies leans my opinion towards malicious intent.