According to The Wall Street Journal, Apple threatened to remove Facebook from its App Store due to human trafficking.
The threat came from a 2019 BBC report giving details of how human traffickers were using Facebook to sell victims.
Documents reportedly show a Facebook investigation team was tracking down a human trafficking market in the Middle East whose organizers were using Facebook’s services.
The Journal said employment agencies were promoting workers that were available unwillingly
The Wall Street Journal also discovered an internal memo that Facebook knew about human trafficking before the BBC pushed their investigation
The full report can be found here