This reminds me of a movie from the early 90s called Crazy People. An ad exec has a nervous breakdown and ends up in an institution. He accidentally sends off truthful ads that he and the other patients write, they get produced, and they are very successful. It was a pretty funny movie. Some examples of the campaigns

“Metamucil: It helps you go to the toilet. If you don’t use it, you’ll get cancer and die.”

“You may think phone service stinks since deregulation, but don’t mess with us, because we’re all you’ve got. In fact, if we fold, you’ll have no damn phones. AT&T - we’re tired of taking your crap!”

“Paramount Pictures presents ‘The Freak.’ This movie won’t just scare you, it will fuck you up for life.”

“Porsche. It’s a little too small to get laid IN, but you get laid the minute you get out!”

“Volvos, Yes they are boxy, but they’re safe”.

Cloudflare: We’re the single point of failure of the internet

ARMALITE: Mass Murder for the Masses

Nissan- yeah, our cars are cheap-ish, and we finance ANYONE, but that’s so we can butt-fuck you on parts when our cars inevitably break, repeatedly.

Reddit: The Front Page of the Internet (maintained by suckers for free)

Applebee’s: When you want a skillet meal, but can’t be bothered to heat it yourself