Summarizing these 2 facts, it should be clear that a fair player don't have troubles withdrawing from 1xBit.
Unfair player gets a refund.
ps. so far, over 12 BTC were refunded/restored just on this forum.
Wrong. You guys blatantly steal funds(Winnings etc) from some gamblers and provide a bunch of excuses to cover your tracks. Your site does refund deposits sometimes, but the winnings get confiscated and there are plenty of examples available to prove this.
Your claim about >12 BTC being refunded could be legit, but you are ignoring the fact that you guys scammed a way bigger amount in comparison to that amount.