Yeh but in aus for example its actually cheaper to buy it of cd-key sites, even ordering a phsyical copy from overseas is cheaper in some cases
I didn't play BLOPS, but even if you bought a CD-key from overseas dont you still just activate it on steam and download it via steam? That's how it worked with MW2, but I'm not sure as I didn't buy BLOPS (actually I didn't buy MW2 either, a friend had it