We all know how the VGA works.
They grade loose items the same as sealed; based on their condition. Of course they'll slab prototypes, and NWC carts, and rare loose items, etc. I would if it were my business. It's a great way to spread the word about the company, especially when those high profile, slabbed game auctions go up. I'm not really a fan of the what they do, as it's an excuse for sellers to try selling common games for 3, 4, or 5 times their average price, but they've got a good thing going for themselves, and that's without question.