I think I will be something like this.
There will be two types, a weekly lottery and a monthly lottery. One lottery ticket will cost like 100 crowns, and you can choose six numbers by yourself or you can have it computer generated. So the money you spend on the lottery will go to like a storage. The weekly lottery will be drawn every Monday or another day of the week. If all the numbers on your lottery ticket match the winning numbers, you will get 100% of the storage. If two people get all the winning numbers, each will get 50% of the storage. If three people get it, each will get 33.3% of the storage and so on. If you get five numbers, you get 80% of the storage. If two people get five numbers, then each gets 40% and so on. If you get four numbers, you get 50% of the storage. If you get three numbers, you get 25% of the storage. If you get two numbers, then you get 10% of the storage. You get nothing for getting one number. If someone gets six numbers, but someone else gets five numbers, the person who got five numbers gets nothing. But if someone gets five numbers, and someone gets two numbers, the person who got two numbers will get 10% of what's left. The rest is the same system.
I think this will be a great way to earn crowns without doing anything, because I'm very lazy. Also, being a Taiwanese, during Lunar New Year everyone buys lottery tickets. I think buying lottery tickets is fun, because of the suspense and anxiety you get when they announce the winner and everything. I hope this idea will get put into the game. :D