Or worse yet, I can see a daemon sitting around, snarfing juicy details and exfiltration. Along with that, it could contribute to booters' network. And as a near-last resort, it crypts everything to extract more out of the user. It can then monetize even this by being an infector and staying on the network (not reformatting).
Another thing that goes along with this infector idea, is by using OnionBalance, and using a load-balanced onion site to promote and speed up various "things". Since we're dealing with illegal, well, there's plenty of things that could be leveraged to host.
Yes, I do a lot of things in Tor onionland. ALl of my network exists in there, as does control to much of my services, MQTT, database, and more. This is how I use it: https://hackaday.io/project/12985-multisite-homeofficehacker...