That would be because video games and computer applications are leased not sold. Remember that little screen that you have to say "I agree" before it will let you go any further? By doing so, you have just agreed to lease (not purchase) that product and must abide by their terms, there by getting around right of first sale. Many publishers are trying to do the same for ebooks. Always check before you agree to anything. You never know what might be a binding contract.
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