There is really no guaranteed profit over gambling and even if the style of playing is very easy it is not really easy winning it cause it has a risk even if the house edge is 12% there is still a risk to take over playing it, and I think even if they say that the house edge would just be 1% are you really sure it is 1%? they would still want to profit on their site and we could never really know the real percentage of a gambling sites house edge if we would not personally try it out.