Well I concur to the use of VPN cause it gives a user friendly process and opposes restrictions of servers but then I don't see why some Casinos don't buy to the demands of using VPN, probably they see it as a means of intruding into a privacy which is why they usually include that in their terms and conditions but then if there's a beneficial means to use VPN in the casino why is it restricted by some .
The only benefit that I can think of that makes some casinos allow users to use VPNs is as a result of them not being limited by country restrictions that block the citizens from that particular country from gambling. They don't want to miss the traffic and revenue that can be gotten from those people.
For those who don't allow it, they don't want any stress of a gambler trying to outsmart them, especially for those who are banned from using the casino or casinos that are strict with regulation; they don't want to be queried by any government for allowing their citizens access to their casino.