Right now, 0.01 BTC is the minimum withdrawal. It's also, right now, the minimum gift that any of the Soldier Statues give, so players can withdraw any gift right away.
The 0.01BTC gifts are getting sort of expensive - I think we gave away 25 BTC or so in the last week, and might be down net 12 BTC for the week. IOW, some people deposited BTC and played: Some won and took their winnings, some lost, some got free gifts and played with those, some took gifts and withdrew them.
I'll soon start doing a mix of <0.01BTC gifts, along with existing denominations (0.01, 0.05, 0.50, 5.00), and allowing smaller withdrawals. There will be a checkbox for the player withdrawing to pay a 0.01 BTC TX fee, and it will be permanently enabled for withdrawals <0.01 BTC. (Most nodes won't confirm transactions <0.01 BTC without a 0.01 BTC fee, correct?)
Teppy