Op I can still remember that I created this kind of thread about freebitco in my early days in the forum. And from that I also discovered that it is mainly for the additional promotion of the casino for more gamblers to visit the casino and join. Well I don't blame them because it is also a way of getting gamblers attention. And even though they are not giving the 100% bonus as started they normally give some percentage from another event or the same advertised purpose. I saw a casino today giving 100% bonus and I was like it is not possible.  Though some can do it then it will not to all the participants but some selected gamblers.