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

You see there are casino restrictions on some countries and if you try to access it from that country directly on browser the site won't load for you but players from that country choose VPN service to bump their address to other countries which are allowed to gamble on that casino.So this is most used case in gambling and yes also use it avoid tracking yourself but mostly paid one's do this job better.
I am surprised that people are using VPN while duelbits clearly states in their term of services (
https://duelbits.com/tos) that you cannot or should not access their service from a banned region. So if anyone is using VPN from a banned region, he may lose his account and funds, if got caught, so be careful.
By accessing or using duelbits.com or you confirm to be not from any banned or restricted Region. You may not access the Service from a banned Region via a VPN.