Most of the gambling sites that require both level 0 of 1 kyc always state them clearly in the terms and conditions so that they can keep the customers informed about the casino stances on kyc and what customers can expect when dealing with the site.
Personally, I have no problem with casinos or any other services that enforce kyc, be it level 1 or complete verification, as long as they are being transparent and don't try to hide it. What am against is those who claim they don't require it but will ask you to verify your identity and freeze your account as soon as you make a big win or try to cash out.
If you are not going to comply with the Curaçao license terms then why having it in first place!