Are we sure they were higher quality? They estimated in 2024 that 10% of their revenue was from fraudulent ads or ads that should be banned based on their own rules.
https://www.reuters.com/investigations/meta-is-earning-fortu...
This is nothing new, profiting off of fraud and abuse has been the name of the game for all the big advertisers from the beginning.
My vague recollection from 10 or 15 years ago was higher quality ads.