Yes I also think this casino is one of the best vpn users friendly Although I don't know when or how long it will last . And yes most of the case when some players use free vpn which are not provide the best service then they face some errors. Even then it's quite vpn friendly but it can't speed up internet speed so I also think it will be a good step if build miror link taken .
They don't allow use of VPN if you are playing from a restricted region so we can't say they are VPN friendly casino and you can read it in their T&C in which they clearly mentions about it
https://duelbits.com/tosSo you are using it on the risk and once they find about it you know the consequences of being banned.
Very important to read the TOS just like what you mentioned you are using VPN at your risk since he's usng it
from a restricted place, the consequences is when you win decent amount of money, chances that being ask for kyc is really
happening to any gambling sites.
Restricted area will automatically be banned and your money will be lost, but if you are okay with that risk then it's still up to you.