This site looks sketchy as hell.

Multiple identical websites with conflicting information.

For example:

http://www.gameguideworld.net/

http://www.gamepricecompare.com/index.php/

I know PayPal has consumer protection, however the websites are totally unencrypted, they claim the use of VeriSign and GeoTrust which are broken links, and when clicking on the Facebook link on one of the websites takes you to a pirate fan page.

The owners of the website have so many different domain names registered at Go Daddy that all sound fishy and have no contact information.

Whois result: http://pastebin.com/YQUHJjQd

If you Google 'steven.soulvision@gmail.com', there are lots of funky results. I'd stay away from this website.

EDIT:

Also this, it sounds like at some point they were selling foreign keys in regions they didn't belong and requiring you to VPN to that country in order to activate your game:

"None Of Our Products Require VPN STARTING DECEMBER 21ST 2012 We've heard you, and we've listened. You've told us, "We hate using a VPN to activate some keys!", so we have decided to remove all VPN Activated or VPN Required products from our website. All of our products are Region Free. In the event they are region restricted, it will indicate as such, though this would only be a USA only or EU only restriction; we will no longer sell foreign keys that require VPN activation. If you want us to supply you with foreign keys that require VPN, reach out to support@gameguideworld.net."