With regard to the withdrawal process, we have 24/7 operators to take care of this department, and so most of the time we have instant approvals. Its fees depend exclusively on the blockchain
I really like the fact that withdrawal fees is dependent on blockchain activity and trend of current fees. Some crypto casinos are charging a fixed amount for each withdrawal which is really harsh on the small players.
Playing, depositing and withdrawing typically doesn't require KYC, but in rare cases, as part of our Terms and Conditions, "3.9 We have the right to carry out “KYC” (Know Your Customer) verification procedures [...] if we determine that you have supplied false or misleading information".
Does this happen when a player wins big or when there is a doubt about the legitimacy and legality of the funds deposited? If the latter is the real reason, I don't see any problem but I hope just because someone wins big, they won't be forced into a KYC.
Players regularly cash out big wins at TrustDice, as we do not require KYC for withdrawals, unless there is a suspicion of fraud or other illegal activity in relation to that account.