but if an account is a Link to same IP and without violating any of the casino's rules I don't think it will be a big deal having such case, so if you share same IP with someone else it doesn't automatically translate into violation of rule until the crime itself is committed.
If its the same IP only, I don't think there will be an issue, but if its the same IP with the same device and the same coordinates of location, the system will mark it as suspicious. I used to have a platform where part of the platform is I can trace IP, device, and coordinates, and it's not a gambling platform; it's much more sophisticated when it's a gambling platform.
Gamblers should study the structure of the words being used on the terms when it comes to VPN and double accounts; when they use the word strictly, they are not going to wait for something to happen to disable your account.