Board Thread:Questions and Answers/@comment-78.108.163.15-20130712204939/@comment-12176464-20130713220204

You get chips every day after you've logged for five straight days, you also can get one additional bag of chips from your team mates every day. You can also get chips if you manage to get all the cards needed in order to exchange them against a bag of chips and on the CC FB fanpage.

As for hamburgers, you'll always get one when you do the additional investigation, one of the three characters will always give you one hamburger when you've done their request (the others give XP or coins and clothes or hairstyle or accessory). You can get a hamburger when Criminal Case's facebook fanpage give a free meal when they have a certain amount of "likes", or when it's the wheel of fortune.