The reason why the popularity is so high on the no deposit casinos is due to several different factors. One of them which some might consider to be a significant factor is that it is merely a source of entertainment as you learn the machines. As you discover how the games are functioning and seeing the kind of payouts you are receiving the popularity increases.
Users are often looking for more deals in the way of a no deposit offer so they search around looking for specials which they find on the web. Do all sites list every possibility? No most do not for different reasons, some casinos have bad a reputation where they wont promote them to visitors of their sites. The majority of online casinos that are still left online are decent with the exception of a few.
No Deposit Bonus
What happens when you join a no deposit casino is you will be required to provide legit information that can be verified normally with government id and utility bill. This is a common practice and it is done for security purpose normally only when you withdraw funds. It is only for internal use and not given out to anyone. You will only be allowed to join a free no deposit casino one time, do not delete and reinstall to sign up multiple times. The results of this be having your account locked and you banned from the casino and any other casinos that owner happens to own which they do normally have a few.
Most of the no deposit casinos that are online will credit your account quite quick when you sign up, some will be instant. Have patients if it is not there the minute you log in and check back a bit later. I must warn you that the casinos do track computer id and your ISP for fraud protection. So if another family member wants to sign up at the no deposit casino they must not sign up at the one you already have as that is against the rules. They can sign up for any you have not already created an account with.