If you want to keep yourself anonymously there's a lot of platform offering no KYC and the duelbits too does not have a KYC mandatory but if you might have an issue with your transaction with the platform itself there's a chance that you must need to submit your KYC verification to them so make sure there no abuse happens to the transactions.
There are lot of users having problems with the KYC norms and still want to play on that particular casino which is problem so the best is if you want to have complete privacy go with casinos not having any such requirements and enjoy the games there but for me i am satisfied with normal KYC norms and duelbits don't also is fine for me.
Most of licensed casino needs KYC at some point that's why if you are not ready to give your personal information it is much better not to play on those sites and risk your money to unregulated gambling sites. I would choose to go on KYC on reputable site rather than risking money on no KYC site that can turn a scam anytime.