Just keeping this around for posterity since they deleted the HN posting and maybe others will want to see the truth if they are googling around for why you are getting spam from these guys.
I called them out for being a the spammers that they are, and I got a rather odd response:
Hi LatchKey,The HN thread goes on with a lot of people pointing out their own issues with GitHire and I have my response to the above quote here: http://news.ycombinator.com/item?id=3508750
I'm really sorry that we sent you that email. We just launched a little over a week ago with this crazy idea, and were extremely surprised at how quickly we were overwhelmed with orders.
We made a bad judgement call in sending some emails to people asking if anyone is interested in jobs.
If it makes you feel any better, you can see that we aren't finding very many talented engineers, and we will likely need to refund a lot of money in a few days.
We are honestly trying to be a great service for software developers and employers. We need feedback from people like yourself to learn how we can be the best service possible to reshape the hiring industry.
We actually sent you an email, but never heard back. Please let us know if you're interested in continuing this discussion further on or off of a public message board.
Thanks for keeping us honest.
Sorry, but I just don't have any tolerance for spammers or people trying to profit off my profile without my permission.