As far as I know VPN is an anonymity application and can open any website.
It depends of the kind of VPn, there is a few that just change your IP and some website can still be blocked even if you are using some kind of VPN.
VPNs are usually used illegally However this does not apply to all types of websites. Many countries that do not support online work are often scammed They then change their address via VPN and work on the website.