wow, I'm seeing some amazing assumptions here.. saying maybe didn't meet any wager requirements and etc.. trust me there isn't anything like this at all. deposit. and wd =)
Well good to know that it isn't the case.
I visited their TOS and found this confusing

You are only allowed to withdraw BTC instead of ETH and it has nothing to do with confirmation at all if we follow that.
It could also be a case of failure to update their terms.