As the name suggests, this type of bonus allows you to place free bets equal to the value of bonus. For instance, if you got bonus worth $100 at the time of sign up, you can place bets worth this amount in various games. This is really good option for trying new games on various casinos. You might get lucky and make some money without the need to invest anything.
Did any of you made huge money with this bonus amount ?
I personally had experiences with these kind of promotional bonuses that some online casinos give, and let me tell you something they are a total scam, i signed up in a couple of them and i did place some bets and i won but when i wanted to withdraw my winnings i couldn't even when i contacted the support they totally ignored me, and this happend to me with tow or three websites, i just think they just don't expect you to win so they give you like a few bucks.
Well I have a similar experience, but when I try to withdraw it, they require documentations, in short KYC. So I contacted support and they give me a lot of bullshit reasons. So I just played with the supposed money I won, I even asked my wife to play slots for me because I was pissed out with that website. And in the end, bankroll got busted. But its good thing though, it my wife multiply that bankroll then I guess I have to passed all required identification just to withdraw it.