I guess another user who does not read the terms and conditions also with the FaQs common problem with the people who just got attracted easily to the marketing strategy of the gambling casino I guess op makes a deposit with new account and get a good profit and immediately want to withdraw which can be suspicious activity tag for a new account. Its the players responsibility to read those needed information to prevent this kind of topic again.
In fact, unlike other sportsbooks in the industry, apart from the typical T&Cs they have at least since September a full AML and KYC policy explained in their website,
here.
In addition, they don't claim that they can make any changes in the T&Cs they want without prior notice, which is also quite typical in the industry. In this sense:
We reserve the right, at Our sole discretion, to modify or replace these Terms at any time. If a revision is material We will make reasonable efforts to provide at least 14 days' notice prior to any new terms taking effect. What constitutes a material change will be determined at Our sole discretion.
I get that many people don't like to read, or even when they do it they understand only what they want to understand. It is good that the OP warned about the KYC so people who don't want to go through that procedure can avoid it before making any deposit in Duelbits. But the way it is written (bold and capital letters) implies that Duelbits is doing something unfair, which IMO is not the case.
Not only being our own bank, but also depositing your cryptos in thirdparty services comes with responsibility. You do have to be aware of the T&Cs.