Simply read their ToS, FAQ and get information about minimal withdrawal or just check it with your own account. It's important step before funding an account for bets as eventually if you don't lose all your money or if you win, you will have time of withdrawing your money, that will be time of a minimal withdrawal number must be acceptable for you. However, it begins when you create your account and at least before you fund your account.
Some more information about withdrawal at Bitz.io
https://bitz.io/faqYo thanks about that. Reading the TOS is important so we can avoiding mistakes. Although maybe not many reading ToS, that will be up to them as they just don't aware that every casino have different rules. After reading the ToS, they will know what prohibit and not prohibit so that can makes them enjoy playing gambling.
You are absolutely right withdrawing and depositing small amounts of money repeatedly is quite a hassle, especially when there are transaction fees. By keeping the money in the account, you do not have to worry about playing later, and your main capital in your pocket is also protected. The biggest challenge in gambling is mental control just as having money in your account creates an opportunity to win, there is also a risk of losing everything due to emotion.
Keeping the money in the account will not be a problem while you gambling and increasing the amount. But be careful that gambling will not gives you much chances to win and besides that, if you have money in your account, that can tempting you to keep gambling without thinking about your plan. Don't forget about your plan to withdrawing your win money if you finally wins much money.