Some online casinos credit players accounts using a bonus code that you input after you sign up for the money to show up in your account. One online casino might have hundreds of different bonus codes some which might be for extra money added to account and others which may have different amounts of no deposit bonuses. Since you will never find all codes that a casino might have in one place it does require a bit of searching to locate any. Even if you do find them unless you went through the link that originally provided the code you might be in violation of claiming where it could cause players to not be allowed to withdraw wins. Your better off searching for a specific casino and dollar amount then going through the link you find on those sites which should display the code. If it does not display the bonus code then it was probably not a valid offer in most cases, there is some that do not have it listed on their site but most will. The ones that are not listing the promotions on their site include.
When you do visit a casino that is advertised for having free money and as you enter the site you do not see the offer, go to the promotional page as it should be there with the exception of the above 4 casinos. For example you click on Palace of Chance and the code or sometimes referred to as a coupon is on the page you land on. Not all online casinos are giving away money for free but with this particular group of casinos a lot of them all. What a lot of people like about the codes is the money is right their in account instantly so no waiting is needed to start playing. On the no deposit bonus you are not allowed to cash out much money on a win, some have like 20 dollars maximum so overall a purchase offer is better option if your wanting to play for real and make money if you hit.