From the featured PlanetXbox360.com editorial (written by a GS employee):
"I think the used game market should hang around as long as it can, and I think you should have the right to do whatever you want with something that you have purchased. However, I have never and will never trade any of my games in. No matter which way you look at it, you shouldn't have to trade in over five popular old games just to buy a new one. I can't justify that in any way, but I also can't speak for everyone. So my only solution to the unfairness of trade prices is for you to just not use the GameStop service. This article will focus more on how GameStop is helping to kill the used-games market; even though that’s the exact opposite result they are seeking."