First of all you can't even register an account on duelbits.com if your from a banned or restricted country.

Here is what their ToS says : "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."

Also you can find the complete list of banned countries, and restrictions for certain games,etc in their site : https://duelbits.com/tos