OMG... those hackers are complete idiots!
"The hackers claim they know of about 30 unpatched Firefox flaws. They don't plan to disclose them, instead holding on to the bugs."
"I do hope you guys change your minds and decide to report the holes to us and take away $500 per vulnerability instead of using them for botnets."
"It is a double-edged sword, but what we're doing is really for the greater good of the Internet, we're setting up communication networks for black hats."
30 * 500 = $15,000
Those two hackers could have scored $15,000 to share amongst themselves by simply disclosing information about their findings.