I wouldn't swear on it, but I believe another wave was a few years later, 2018-ish. Not sure if Flash was still a thing back then, but Google has been allowing

I wouldn't swear on it, but I believe another wave was a few years later, 2018-ish. Not sure if Flash was still a thing back then, but Google has been allowing JS to run in ads as well (as far as I remember, at least in some formats), and someone bypassing their automated checks isn't unheard of.