You could make some unique games with new features, as you can see with their opinion lottery is a bit old school and i don't think people would be attracted with it too much and I'm one of them. The probability of winning is very low, that is my reason. Maybe it could worked out if you would out add some new features with it. Don't worry i would love to try it out if what will be the outcome of your plans.
So thats why he just erase the lottery provabilities on his idea since it was unclickable business people always wants to spend on skill based games and he shoukd take some pointer and ideas for this so that he can improve on it. Space game might be better since i dont see any site offers a game like that.