You really don't have a single bloody idea how market works, now do you?
I am going a little further and say that you don't have idea how economy wise goes in video game industries, any game will coast money but not guarantees of return, is not the best interest to them simply block used games because one time players won't buy something and hate it, games are basically gamble if you don't play your cards right it is for no use.
Just use your head now, if you were a seller would you like it more a client that bought a new thing but bad mouth and make other clients less willing to buy your product or a client that didn't directly gave you money but give you free market, hmm?
You really does sound like a overly sensitive person about this matter is someone is your family connect with business of this kind?