Often, it's simply comes down to luck. However, there are a few things you can look out for in a No Deposit Bonus that will increase your chances to win more real money with it!
As a rule, the bigger the bonus size, the better. however it is important to compare the wagering requirements and the withdraw limit. The lower the wagering requirement the simpler it is to play the bonus and then play through the money you won from the bonus and get your real money. So, we recommend you go for No Deposit Bonuses that have a low wagering requirement. And possibly most importantly, choose casinos that have a high withdraw amount. If you win $200 with your bonus but the withdraw limit is only $20 you will only be able to withdraw $20. So, the bigger the withdraw limit the better!