Some casino verify an account more than a week while Duelbits only took 4 day to verify your account and allow you to withdraw your balance. You should complete KYC in advanced next time if you don’t want any inconvenience of waiting for KYC verification because you are required to wait whenever your account is subjected to KYC.
This is a normal procedure that usually take some time so your delay experience is normal in every casino not only in Duelbits.
Both sides have valid points here. On one hand, the customer has every right to be pissed with the casino thanks to KYC delays while the casino actually processed his KYC in an optimal duration on the other hand.
KYC was always mandatory in FIAT gambling sites, but it's slowly and steadily becoming mandatory in crypto gambling sites too sadly.