content: Maybe part of the fact, is that their malware does the most of the work for them, and took measures to have secure command and control.  Silk Road required trust between the buyers and sellers at a semi-central location, and such, required verification that they were humans -- This was Silk Road's downfall, as the CAPTCHA (3rd party service, If I remember right) leaked the true forward facing IP address of Ross Ulbricht's router, A flaw he didn't notice.  It wasn't a matter of priority, it was a matter of the prep overlooking something.