> 2) There are more ads going out then can be reviewed

The "more than can be reviewed" might have been a logical conclusion in a purely human based workflow, even if you have the lowest cost per head click workers in like, an external contractor call centre type environment in Bangladesh.

As the author points out, the ordinary consumer class version of publicly available Gemini very accurately classifies the ad as malicious. I really doubt that there are THAT MANY unique new ads being submitted per day that they can't afford the compute to run them through a similar classifier.