Earlier I gave an example of GREAT map from the New York Times (here). Here is a lousy map from Semetric (who lauds their data-driven business).
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The problem with this map (from their PDR report - here), which tracks music downloads is two-fold. First, the basic message is "what is this map saying"? This is total music downloads, but the story is about illegal music downloads and they aren't broken out.
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Second, in case you haven't noticed Alaska isn't part of the USA. And Yukon, the Northwest Territories, Nunavut and Vancouver Island are not considered part of Canada.
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That is a crap map for someone selling data.