Never seen before? Is this just like the keno in stake? I don't really know because I still didn't visit your website. But I see that you have incentives to those who will sign up. They will get 25 mbl If I'm not mistaken. I am looking forward to use this gambling website.
No, You need to buy tickets and everyweek when powerball draws their combination and you manage to get the correct numbers you will win 2BTC + millions of MBL tokens that you can use to buy more tickets.
The signup bonus is 20 MBL tokens after email verification.