It has been discussed on ha.ckers.org when the Microsoft Security Response Center started a thread with their new system/email/team/i don't know what. But well, the point is that hackers do not get any reward for the time they spend to disclose some vulnerabilties
And it would be okay if bad guys who buy/sell 0day vulnerabilities.

Today, I received this on the fd mailing list:

We buy and sell 0day vulnerability along with working demostrative exploit. We are interested only in client side exploits. We are interested in Internet Explorer and Microsoft Office. If you have good vulnerability we can pay cash, western union or wire transfer in advance. If you are a motivated researcher and are interested in a full time consultancy let us to know. Please contact to this email address. We own and sell several Microsoft 0day (the one used by a couple of asiatic intelligence agencies) and we buy them from skilled hackers.

So, if you would pay, even few bucks or softwares licences, hardware etc. hackers would rather send you the 0day than going to see that kind of bad guys...