Line 11 Tl;dr = FBI use relay early attack 1st half of 2014 to crack Tor and see real IP's connecting to onions but cant see what they are doing or where on the site they are going. SR2 has vendor specific onion only for established vendors, vis a vis IP=Vendor. Had they not had this people questioned could claim they were just visiting the site.
As usual, I find the FBI's version of events hard to believe.
If they'd totally compromised SR2's vendor URL to leak IP addresses, why haven't tons of SR2 vendors been rounded up and arrested? Or was this some type of Java malware injection, and only DoctorClu was dumb enough to have fallen for it?
Remember, they only mentioned this supposed exploit with DoctorClu's arrest. Like I said yesterday, I suspect they found his IP some other way -- his numerous Reddit posts, his DDOS activities, whatever. And even when they had his IP, they had no idea who he actually was on the site, and really only had enough for a "knock and talk". Had he just shut his mouth, he may not have even been arrested.