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Sam old storyline over and over again.
If you had lost the bet, they would be happy to collaborate with you, but once you win a huge amount. That when hell breaks loose. They will suddenly notice that you breached the invincible terms and conditions and your account gets blocked. Once, you make so much noise. They will only send back your deposit which is equal to no work done.
Bottom line, when you use 1xbit, You have way too many odds against you winning a bet and withdrawing your winnings