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It is something like investing the rewards again and again and winning more. Leaderboard is kind of the same with winners of the past month for this reason. They do a re-investing strategy into wagering contest.
Maybe you are right, but I think that it's possible that they are just high rollers who would wager those amounts anyway, even if there weren't any wagering contest. I'm no high roller myself, so I know that I will never finish in the top 10. If there were 100 paid places, I would try my luck there though.
Don't know why I'm so lucky with Slots on Crypto-Games recently.
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
First I won 149k sats playing with Bitcoin(see my post above). Then I won 0.0298 ETH:
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2F9hTFsiX.png&t=663&c=1pUuwswmKkCoPw)
And today I won 0.149 LTC:
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2FwWF2cIB.png&t=663&c=SZILUwlQkImVEQ)
And this despite the fact that I don't really play Slots much:
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2F1WPJWyJ.png&t=663&c=VUaBpxXEmYJfDQ)
I don't know what are the odds of hitting 150x payout on Slots, but I'm pretty sure that it is less than once in 150 rolls. And I have never made even 50 spins with any of those coins.