It's because the shape was due to licensing and contracts by content producers, not the technology of distribution. Online distribution licenses were underpric

It's because the shape was due to licensing and contracts by content producers, not the technology of distribution. Online distribution licenses were underpriced and differently packaged for a while because producers didn't know what revenue to anticipate or which horse would be the best to bet on. But as the industry matured, stuff evened out again and it's mostly back to normal. Many conveniences of the new technology are nice, though.