Originally Posted by NarcissistZero
Those key sites are just selling you the foreign version and saving on shipping, I don't know how Steam would tell the difference. I am saying it WOULD happen, I am just saying read up on the Modern Warfare 2 thing and know what you're risking, if anything.
Also perhaps pay in your native country and not be a cheap skate Cap, to support the devs
Technically Steam could make it so you couldn't do the first install of that key without a disc. That would pretty much kill the profit margins of the key sites. So for example you just registered Metro 2033 so you need the disc to install it, after that install you can throw out the disc cause it's registered to your account and now you can use steam's download version. Personally I can't believe Valve hasn't done it yet.