The wagering requirements for a casino bonus are going to be different at every online casino. You really need to check out the terms & conditions section of the online casino web site to find the wagering requirements before you redeem a casino bonus. Most of the online casinos will offer reasonable wagering requirements, but there are some online casinos that offer no deposit bonuses with outrageous wagering requirements that are difficult to beat. Make sure that the wagering requirements are less than 40x your deposit and bonus.
The online casinos have added wagering requirements to their casino bonuses due to abuse from players that want to take the free money and leave. The casino bonus is developed for players that want to try out the casino games for free without making a deposit, and these wagering requirement are put into place in order to make sure that the players are spending a fair amount of time playing the video slots.