Bradley M Kuhn published an interest blog post at the weekend explaining why he
  believes Canonical is about to go down the open core licensing
  route and heavily criticising the company for doing so.
  My take on the post is that it is the worst kind of Daily
  Mail-esque fear mongering and innuendo. Not only does Bradley
  lack any evidence for his claim, the evidence he presents
  completely undermines his argument and distracts attention from
  what could be a very important point about copyright assignment.
  The premise? Mark Shuttleworth has admitted that he plans to
  follow the open core licensing strategy with Canonical.
  The evidence? Mark praises the strategy Trolltech took of selling
  proprietary licenses.
  The problem? Trolltech did not follow the open core licensing
  strategy. Neither did MySQL, which Bradley suggests …
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