And regardless, my questions still stand: was PornHub removing those videos promptly when made aware of them, and making a good-faith effort to ensure they didn't get re-uploaded? Article doesn't dive into those details. If they were, I think a private entity taking an action that could cripple their business would be akin to law enforcement shutting them down without due process or the ability to appeal.
Again, it seems "child porn" is just being used as the "can't argue with our actions because think of the children" conversation-ender it's usually used as.
Edit: Re-reading my response, I'm not sure where I got the bit about how we're talking about copyright infringement. Possible I was reading HN a lot that day and got my wires crossed between articles. But I think the rest of my comment stands on its own.
Regardless... it depends. Are they making a good-faith effort to remove that content from their platform, but sometimes come up short? That's to be expected, but I'd want some commitment that they're working to improve. Did they email me and say "hey, we like child porn and making money off of it"? Ok, yeah, then I'd cut them off.
If I suspected something fishy was going on but wasn't sure? I'd report what I knew to the police and let them do a proper investigation. I wouldn't want to destroy someone's business based only on my suspicions. It's not ok for the legal system to do that, so why would it be ok for me to do that? The burden of proof should still be "beyond a reasonable doubt", and the best place to determine that is still the courts, as imperfect as they can be at times.