It's nothing, you wasn't lucky you just made half dollar. Luck is when you invest couple dollars and make hundreds. I don't like freebitco.in, high house edge and I think you won something little, but for bigger wins there is no chance. I had very unlucky experience with their dices and auto not, to not mention lottery, I never get anything, not even once in couple of months. And I earned tickets with claiming faucets and plus I was buying tickets.
Um, just because it's a small win, doesn't mean it's not lucky... The odds of hitting 8888 are pretty low, and I got it twice in one day.
The odds of hitting a jackpot is greater when you bet smaller. Try bettin with a higher amount and you will see a different result. The guy is right, that ain't luck. Luck is winning big.