If I remember correctly, we have discussed this many times not just here in bcgame. The only solution I see without using VPN is to use the mirror links. I have been doing this on bc.game and stake.com and my gambling experience using these mirror links has been smooth. By doing this, you don’t have to worry about whether VPN is allowed on the site.
To me, what you wrote makes no sense at all, because if a certain online casino is blocked in a certain country, then I don't see how using a mirror link would make using the same legal? As someone already wrote, using a VPN to bypass the access ban can only lead to problems in case of any bigger win - because if they ask you (and in most cases they will) KYC you won't be able to withdraw your winnings.
Well, from my honest understanding, mirror sites are not meant to serve as a way for people who are coming from restricted region or jurisdiction to have access to the site, it only serves as a way for already qualified users to access the site when the main site/domain is not available due to some reasons like maintainance/upgrade, or site simply down due to ddos attack or something similar.
Deciding to access a site using a VPN is completely different, and in the case where it's ok to use VPN to access the site, there is no problem actually, and it doesn't matter whether one is accessing the main site or the mirror version with a VPN, it's clearly the same.
But if VPN is banned on the site, it also cuts across the mirror site as well, using VPN to access a mirror site of casino that is not VPN friendly will get your account banned if the casino decide to take that up for any reason..