the impact those accounts have is much higher than a normal 15% slice of the comments… what they produce is generally non-random, so it’s all going toward whatever set of ideas they need to bombard with bullshit… they intentionally shut down and/or control discussion…
and i think in general, their attempt to really focus on user experience first always seemed to define their business… trying to make things that people would WANT to use was what made Jobs and Apple stand out… other brands were better known for performance, for example…