To explain how bonus codes work, consider one of the top-rated online casinos, Riobet:īefore you start playing in an online casino, carefully study the bonus terms and conditions to sure they are not too strict. However, a code is not relevant to a bonus since it is only a mechanism used to redeem the existing bonuses for new players. Some casino bonuses come with codes and some, in most cases, don’t. They are bonus codes consisting of several letters and digits you must use as a key to unlock definite bonuses. You may find them difficult, but they are not. If you are new to getting no deposit bonus offers from online casinos, then, at a certain point, you will have to deal with bonus codes.