One of the best and most attractive features of online gambling are the casino bonus offers. Almost all of the Internet gambling sites have casino bonus offers which can really be a good deal for beginners and is somewhat a reward system for long time gamblers.Before you sign up, though, you should read the fine print and understand all the details about joining the online casino site. You must also educate yourself on the details of the casino bonus offers you are about to receive, such as how to avail of that offer once you sign in. Usually, a casino bonus offer is linked with wagering, so you need to be aware of your wagering requirements. Normally, once you sign up, you can withdraw any part of the bonus without fulfilling the requirements. The average wagering requirement covers 10-20 times the bonus plus the amount you deposited. This differs from casino to casino.Usually, casino bonus offers can be claimed using different names or different heads. These casino bonus offers are usually found in casino magazines or gaming websites. You need to memorize those codes and enter them when the virtual casino prompts you so you can claim the bonuses.For patrons of an online casino, there are also bonus rewards to keep you playing. Some virtual casino sites will automatically reload these bonuses to your account when they see that you have been playing for a long time and have finished your sign up bonus.There are also bonuses you can claim when you refer a friend. Some virtual casino bonus offers to give out a percentage of your recommended friend’s wagers placed on the site. Some sites offer US $100 worth of virtual chips. If it’s your luck day and you bet the virtual chips to, say a blackjack game, you can win $200 or more without ever putting out any cash.So, how does a casino earn money from all these casino bonus offers?Well, take for example playing poker. The bonus structure of a poker gaming site will usually be based on the number of raked hands or tourneys you play. The tournaments you join or the the raked hands will equate to a multiply of your deposit. This is the process by which an online casino improves its house advantage. If they don’t employ methods such as these, well the site will go bust for paying out all those casino bonus offers.Basically, this is an overview of the casino bonus structure. Of course, each site has different mechanics and different offers. You really need to put in a bit of time to research and find out the best casino bonus offers that can give you a great deal for maximum enjoyment.