I have worked with them in the past. One of the key things was that they managed to get every company in the tech task force to collaborate through things like

I have worked with them in the past. One of the key things was that they managed to get every company in the tech task force to collaborate through things like shared hash databases; so if someone uploads child pornography to imgur, facebook or tumblr, they can all take advantage of the other's experience. Then the tools they share with law enforcement allow them for instance to easily search personals posted around the web for dodgy ads, or search content in darknets. My involvement was around a particular case in which we collaborated with an FBI special agent to try and catch a person who had posted images online abusing a very young child. Due to the nature of the investigative process, we had to share more with them than they did with us. Not sure if we had a hand in it, but they told us that predator was arrested and the girl is now safe.