These are special codes you enter into an online casino form to get bonuses and freebies. Online casinos can’t offer you all-u-can-eat shrimp, but they offer something just as tasty: casino bonus codes. While most of these comps are reserved for VIP players, there are still some freebies you can snag at a brick-and-mortar casino (though they are fading fast). Unlimited free drinks while you’re gambling, tasty all-u-can-eat buffets, and ‘room comps’ or free nights in the casino hotel. Most people know about bonuses and ‘comps’ from land-based casinos.