You aren't supposed to use VPN to hide your citizenship, (which seems to be ongoing trend, and i assuming you are referring to that with "your jurisdiction"). That's against the terms and conditions section 3.3.
You can use VPN for other purposes though.
But even then, i wouldn't count on other players not using those recycled IPs of some VPN services and not getting flagged for using 2 accounts.
I will also not deny your concern here. Suppose you are a citizen of those countries where betfury restricted their service and that case if user try to use VPN for registering on betfury and once for any kind of reason betfury also have the right to asking him kyc verification and on that time may be that user can in trouble with his money, IMO. You can use VPN for other purposes though.
But even then, i wouldn't count on other players not using those recycled IPs of some VPN services and not getting flagged for using 2 accounts.
But I guess if there is small amount shouldn't have to face the issues
. But sometimes deposit bonuses give you a longer fun time if you know what I mean 
. It is always better to read the terms and conditions about deposit bonuses as you rightly pointed out that not every game is included in wagering terms.
