Lotteries are generally best for physical items such as Houses, Cars, Phones, etc and for charitable funds.
However good luck to you and your new site.
I would say that this is the fact of the matter for lottery games. The chances of winning lotteries are really slim compared to just playing gambling games at their highest multiplier. I haven't seen a bitcoin lottery that progressed to be one of the most competitive gambling site all over the world. Most of them just die, though maybe OP can offer something different and be able to survive, who knows.