It doesn't necessarily mean you'll get a beta key, but it's got to be worth a try, right? According to the official blog, a total of 9000 keys have already been sent out to players of Counter-Strike 1.6, Counter Strike Source players, and members of various communities -- but now the survey is being opened up to everyone. Fill it out and you have a chance of receiving an invite to the beta.
Apparently the survey has "no wrong answers", in other words there's no way to guarantee yourself entry into the beta. I'm guessing the survey exists to help gauge various different demographics, Counter-Strike experience, just to get as much varied info as possible. In a nice touch, the team is continuing to gift some beta players with keys for their friends. Can't help but think that one will be exploited heavily -- IT SHALL GO TO THE HIGHEST BIDDER!
You can head here to fill out the survey and throw your hat in the ring. If they're looking for a completely rubbish CS player who legitimately lost to his mother in-law multiple time at CSS, look no further than THIS guy.
[Points thumbs at self]