I just don't know the exact rules about manual conclusion when already verified, that's why I asked here. And in general, as far as I remember only from my home ipi or from my mobile I played. I don't use vpn often (although I may have to more often as my country started blocking gaming sites). I mean, I don't think there are any questions about my location.
Be very careful with your VPN usage, especially if you come from a country where sportsbet.io is prohibited to offer its service. By the way, I have heard that casinos let old customers to use VPN to bypass restriction and don't block them for violating this particular part of ToS, so, be sure to figure that out with Sportsbet before deciding yourself to use a VPN.
Regarding the VPN you might be using or still connected to a network that used a VPN before which makes your access a little suspicious, so they need to check it out, or do you often use free VPNs, it's quite dangerous to your activity.
Both, free VPN and paid one are dangerous when you use a shared IP. In order to get rid of trouble and be sure that your IP isn't blacklisted and no one uses that, is to buy a VPN with dedicated IP address. Dedicated IP is sold separately but be sure that your provider offers one.