Jailbreak community owes a lot to adept hackers who find and exploit weaknesses in the design of iOS mobile operating system, thus allowing Apple's mobile gadgets to run unsanctioned software. It's more often than not a neverending cat-and-mouse game between Apple and hackers that at the end benefits jailbreakers the most.
Say you're an expert hacker who just figured an exploit in one of Apple's products. You could report your findings directly to Apple and help them plug those holes with a software update.
But did you know you could also hand over this valuable information to an exploit broker who will sell it to a government agency and net you a decent profit, minus the broker's commission? A U.S. government agency, to be precise...