Earlier quoted context omitted.
How does a rubber hose work when the people are talking via Tox or via .onion sites?
They might own a significant share of Tor relays and exit points, likewise for Bitcoin.
I can send data to .onion addresses natively via DNS ( https://trac.torproject.org/projects/tor/wiki/doc/LinuxDNSre... ). I can also receive data from Onions as well.
Right now, I have Node-Red communicating data from my IoT infrastructure, publishing data to my MQTT broker elsewhere (my server onion). I have my 3d printers in another place, and part of the MQTT data is pictures and GCode readouts from them.
It sounds complicated, but Hidden Services allows me to treat a network of disjointed machines (all behind NATs) to be thought of as being on one huge ethernet hub. And I can code against an [hash].onion and know that my data will reach that machine, no matter the IP.