Your potentially scratchable DVD is exactly a thing you spend your money on at Wal-Mart. With Apple, you don't spend your money on anything physical. You expli

Your potentially scratchable DVD is exactly a thing you spend your money on at Wal-Mart. With Apple, you don't spend your money on anything physical. You explicitely spend it on a service provided for you that allows you to redownload the file whenever you want. Any exceptions to that should be clear from the start, not buried in a small font somewhere in the ToS.