Nitrogensports offers a similar type of prediction/lottery in their blog page called Nitro Squares where you predict the last digit of the total scores in NFL or certain events. There's free ones that you could always try out but the slots are usually filled up quickly. With lotteries I feel like there's no good strategy other than bankroll management since you can't rely on any information like the previous drawn numbers in the past week for example.

Also notblox started a thread about bitcoin gambling sites that offers different kinds of lottery, maybe you'll find one there.