[quote name='Gram']Don't you get a beta key from signing up on the official site? That's what I did.[/QUOTE]
Not gonna lie, that's exactly how I got the other codes. Signing up to the website actually gives you a code that gives you access to the beta as well as 2 free codes that you can give out to anyone.
Then, I was given yet another code to give away to other people after I was entered into a drawing for two tickets to PAX. So, there.