I'm not entirely sure how they can track activity on the darkweb back to the original source by discovering a communication port that is going through an anonymous network. 

Even if Sixgill's algorithms could intercept a message between 2 people, that message is most likely being sent over a pgp and is absolutely not going to be read by anyone but the intended receiver who holds the key to view it.  

Sixgill Claims their monitoring is absolutely anonymous and cannot be tracked or blocked on the darkweb by its users, isn't that the whole point of accessing the Darkweb in the first place?

It sounds to me like Sixgill will be roaming an anonymous network intercepting encrypted data and collecting useless addresses that can't be traced back to a valuable source. I will continue to read up on this. 

Thank you for the write, and the countless hours I'm going to spend now researching Sixgill. 

haha 

Appreciate your time.