"The boss of EPIC Games talks about the alternatives that could be utilized to combat used video game sales. One curious option is to develop a game where the final boss battle or ending has to be purchased for second hand buyers and renters. Such measures would hamper the used game market greatly.
Used video game sales are a delicate part of the video game industry eco system in the US. Various video game brick and mortar chains rely on such transactions like EBGames, GameStop and GameCrazy. Killing the used video game market could be detrimental to most of the retail chains. Some retailers such as GameCrazy have reported that up to 30% of the total sales were due to used video games.
"Used video games also offer customers an alternative option to purchasing a game that they might not have considered acquiring at full price. However, the argument from the developers have been that none of the profit earned from the used video games trickle down to the studios or publishers."