A dark web tycoon pleads guilty. But how was he caught?

I would just like to point out that this article downplayed the central issue that brought an end to Freedom Hosting: massive, willful hosting of child pornography and a known and stated practice of refusing to take down anything.

This guy was not just a "dark web tycoon", he was a child porn hosting empire owner. Much higher severity in terms of moral heinousness than say selling drugs on The Silk Road.