If you use VPN, for your web surfing, a free one can work well, but if you use VPN to access platforms where you store your money and play with your money, it's very dangerous.
That is the most dangerous part of it all because, the casino might see you as a ghost player and might not release the rewards for him and also accused him of cheating. There are different negative things involved in using VPN.
And because of that I don't really advise people to use VPN when they are playing gamble. Let them.use the normal network to gamble so they their usernames will display for the casino to see who is playing.