That's because they're asking if someone's done it and wants some cash. If you had, monetizing the knowledge isn't exactly easy. No intelligence agency will bother paying for it.
Why wouldn't they? This is exactly the stuff I'd want to pay for if I was an intelligence agency; you want the hackers to come back with more exploits, after all.
No intelligence company would pay for it if it were publicized they had paid for it. It's more useful to keep quiet and let people think Tor is still anonymous.
