If you go to the trafficking hub petition website, there are links to articles - below is an excerpt from one in 'the New Yorker'
...A thirty-year-old man had been arrested in Florida for lewd and lascivious battery of a fifteen-year-old girl who had been missing for nearly a year; her family had found approximately fifty-eight videos of her on Pornhub and other Web sites. (The company says that it removed the material the day it was notified.) Shortly after that, the Sunday Times of London published an article about the corporations that advertise on Pornhub, including Heinz and Unilever, and noted that its reporters had found “dozens of examples of illegal material on the website within minutes.” (The company replied that child-sexual-abuse material made up a tiny proportion of content, and that the aim was to eradicate it.)...
I'm still letting the bolded bits sink in myself.