I believe this is depend on your luck when you roll to get higher number. And I believe to get something like 9000+ you should roll over and over, but by claiming per hour from their faucet I do not think you will get that number
You will get 9000+ in a draw with 10000 possible outcomes 1 every 10 times you play (on average). I play more than ten times every day and most days I get 9000+ numbers.
They also motivate people to store money on their site by giving 4% annual interest because they know that only a few % of people if they tempt in a year time and play this game then they can make a good money. Never play this game if you want to earn money.
They are not the only ones. Actually, giveaways work similarly. You give people money, so they can play for free and, among all of them, some will end up depositing and losing a lot. So its profitable for them, the same way it is profitable for this site what they do.