All of the examples listed have something in common: they are services for accessing content you don't own. So it is in the provider's interest to find ways to satisfy you with less and/or cheaper content.
The Netflix changes aren't attempts to make their product better. They are attempts to save money by obscuring the amount and/or quality of available content.
By contrast, if you buy BluRays from one company and BluRay players from another company, everyones incentives are better aligned.
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