So which premium VPN service you people are using or recommend to use?
I don't use VPN to access gambling site as it is just an over burden in terms of cost and speed but still i am eager to know the reason for using a VPN. Do you want to hide your identity while gambling

The main reason why I use VPN is because my ISP blocks almost all access to websites that contain gambling and even binance which is a blocked for a long time so that many users from my country can only access it through the application, maybe you will face a decrease in internet speed if you using free VPN but I don't experience it in VPN premium but as you say you have to be ready to allocate funds and in my opinion you can share your account with your colleague so that you can share subscription fees, But don't ever use VPN to play on the casino where your country is on the restricted list
So this means that duelbits is not banned in your country but gambling is not allowed in your local country and hence ISP block the gambling sites and you need to use VPN to access the site. In that case, there will be no issue from the gambling site but if somehow ISP comes to know that you are still playing gambling, maybe they can take legal action against you

Anyways , duelbits have nothing to do with it and they will have no objection over your playing gambling.