Here's a video that analyzes why they did this. In short, it's a business decision. They want their sales to be compact, especially on re-releases where people are more likely to wait before they buy the game.
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About Elia Palesone of us since 9:45 AM on 10.04.2014
Eli Pales owns pretty much every single product Nintendo puts out, and due to his impulsive tendencies, he also tends to purchase every gaming product put out in general. When not gaming, he’s probably running cross country or writing. He makes sure to take regular gaming breaks, though.
You can follow Elia on Twitter: @Paleselan