TheAtlantic pays people to spam the reddit with content, and buys high karma accounts to vote up content. Essentially, the companies being banned are the ones with shady business practices.
When did this start being a "shady business practice"?
Here's another bostinno spammer: http://news.ycombinator.com/submitted?id=dmcgregor
I hope HN does a similar thing to the domains being spammed here too.
The automation becomes much less useful when real-live users are the issue. It's easy enough (and probably enjoyable) to spar with the onslaught of link-bots, but paid users (if such users really exist) create a problem which can't be solved programmatically.