Content owners don't make feed readers. If they didn't want people to pre-screen content they could just get rid of their RSS feeds altogether. They haven't done that. They clearly find some value to users being able to find their content through RSS, so I don't think this is why feed readers have failed to breakout.
If Google cannot monetize Reader in its current form and Google effectively loses money because those same pages have Google ads on them that aren't being viewed; then Google has no incentive to keep running Google Reader.
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Content owners don't make feed readers. If they didn't want people to pre-screen content they could just get rid of their RSS feeds altogether. They haven't done that. They clearly find some value to users being able to find their content through RSS, so I don't think this is why feed readers have failed to breakout.
If Google cannot monetize Reader in its current form and Google effectively loses money because those same pages have Google ads on them that aren't being viewed; then Google has no incentive to keep running Google Reader.