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I did played it to join for the competition, but it's really hard to hit the bonus round of Roxdogs, the closest I got is 2 features and I was praying that that 3rd one will fall. And so with that, it's really volatile and obviously, I can' replicate the massive multiplier you got so you are really lucky.
In any case, my entry might not good enough to even win the 5th position as I was still expecting you and the others to make another entry as it has more than 24 hours more to go. For others, you might be interested on the competition, you can check it here,
https://bitcointalk.org/index.php?topic=5528312.0.
I have spent hundreds of dollars playing PopiPlay in the last few days. I have played many different slots, hundreds, and thousands of spins, and none of them have given more than x120, not even one decent for competition. So I am out this week... But it's not just PopiPlay, the same thing happened to me with other providers... when it won't work, it won't work! I had a little more luck with bonus buys, but they don't count, unfortunately...
I have some balance left, and I will probably give it another try now... I hope for at least one nice win for the contest!