They have learnt about the games on the free sites and are now interested in earning some cash prizes. However, before they part with their hard earned cash by playing in the paid online casinos, they would love to experience the feel of the paid games without spending any money from their pocket. The no deposit casino provides them with exactly this option. When you sign up with any no deposit casinos, you are provided with a certain sum of cash which you can use to play the games hosted by that site. Most such sites offer a bonus amount of $10, though there are some sites, like Club Player, which offer as much as $65 as free playing money.