These Cheap Online Music Stores Make iTunes Look Like A Joke

When the iTunes Music Store was unveiled to the world eight years ago, it was a big deal. Songs were only a dollar each. Most albums only ten dollars. It was more or less the only game in town for legal music downloads.
Now there are other stores out there with catalogs that rival iTunes in size and absolutely destroy it in terms of price. You can easily grab an entire album for less than a dollar. With prices this low, why bother stealing music at all?
Let's look at each store using a metric called ROCI (Radiohead's OK Computer Index). Each store's ROCI is the cost of OK Computer -- the lower, the better.
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