The site seems legit enough. You sign up through Steam, which I'm sure you've all done somewhere before. After that, you basically just try to gather tickets, to better your chances at winning. You can get them by signing up with Facebook, twitter, tweeting etc. The main thing would be getting referrals, I guess.
By providing links to other sites, CheapAssGamer.com does not guarantee, approve or endorse the information or products available at these sites, nor does a link indicate any association with or endorsement by the linked site to CheapAssGamer.com. CheapAssGamer.com is owned and operated by CAG Productions, LLC.