Casinos Audit is an independent, free, and public database of online gambling sites and casino bonuses reviews. . Our audits and reviews are straightforward and. Casinos Audit is an independent, free, and public database of online gambling sites and casino bonuses reviews. The revenue of a casino is an important factor, as bigger casinos. Biggest bonus. Yallabet77 Casino is a smaller online casino revenue-wise. Our audits and reviews are straightforward and.