To have worked in both (Pornhub Lead Dev a few years ago when it took off, and more recently tech architect at some ad shop), advertising is wayyy shadier and scummier than porn, no doubt.

I lasted barely a year in advertising, the whole industry is a scam, top to bottom, big players and small, just scam and horrible people. Worked 5 years at MindGeek/Manwin, saw/did some dodgy shit but nothing that made me want to distance myself from the industry.