And? Don't get me wrong, I see your argument, I just fail to see why it's an issue. If people don't want to pay 60 bucks for a game, I'm pretty sure they are allowed to in the US.
IF the game industry was at all smart, and they have proven time and time again that they're as dumb as a sack full of fucking retarded hammers, they would just start up their own second-hand business and crush gamestop on price and convenience.
They're allowed to do whatever they want but that doesn't mean the industry can't workaround their actions either. I'm not defending all of their choices, I'm just pointing out that they are a reaction to consumer choices so far.
Your example of an industry second hand sales store is inherently flawed at the conceptual level unfortunately. Gamestop makes probably 80% profit before expenses when it resells a game and that figure inches closer to 90% when you factor in the people who do "store credit". It doesn't matter if that price is $50 or $15. If Sony offered second hand games for $15, Gamestop would literally just go $14 and call it a day. They do this already with existing competition in retail second hand sales.
The industry isn't being "savvy." It's being a whiny, petulant child that continuously saddles its legitimate customers with more and more retarded horseshit hoops they have to jump through in order to enjoy, or in many cases even USE, the product that they just bought.
That's your (understandably) emotional interpretation to the situation. As a consumer who gets affected by this too I often react the same way but when you look at it logically they are doing exactly what the consumer has done to them. Just because other industries haven't figured out how to get away with it doesn't mean it's "wrong" or something. The gaming industry is in many ways different than industries too, people often incorrectly just compare the end product while ignoring every other aspect.
That being said I think there is room for second hand sales in the industry and I do think that it also does make a positive contribution to new sales, I'm just not sure that's meaningful enough to outweigh Gamestop flipping every copy 20 times. Obviously there needs to be a middle ground for the industry and the consumer but we have yet to see it.