Fortunately there aren&#x27;t many with Tavis&#x27;s skills, but you don&#x27;t need to be that legendary to find these sort of vulnerabilities.<p>Assuming you can identify (skill) and safely sell (anonymity expertise and market savvy) a zero day, the demand for them is quite limited. (The only reason the price is so high is that the supply is just even lower.)<p>Additionally, if you have the market savvy to extract the maximum value for a 0day, you will quickly realize the feast-or-famine nature of unsavory income isn&#x27;t great for a stable home life. You might eventually want a day job, and you can&#x27;t exactly say &quot;Oh, I helped that virus penetrate your network three years ago that you just detected last month.&quot;<p>So most people with Tavis&#x27;s skill levels typically aren&#x27;t in a hurry to go rogue.<p>And the ones that do are more interested in compromising bitcoin exchanges and drug marketplaces on Tor Hidden Services than they are in spreading malware to end users. (That&#x27;s the advertising industry&#x27;s shtick.)