The split greatly lessens the benefits of having Netflix as a single source for home movies.

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But there is bound to be the question: where does the advantage lie in an investment bank which is cut off from its in-house source of funding, and should it not simply split completely?

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Apple obviously writes its own software for the iPhone, but Samsung's phones all run a customized version of Google's open-source Android, and Samsung is so dominant that it could very well split off and start building its own version of Android, just as Amazon did with the Kindle Fire.

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