It seems a bit unfair to criticize his language as derogatory when Cory’s language is hardly neutral.
Well, the RS article contains a disavowal from the analytics company, and even Cory has updated his post on it to reflect that “Iron Maiden did not decide to tour latinamerica based on Internet analytics about the countries where their music was most pirated.” And as a comment to that post notes, Iron Maiden had long toured in South America, so it’s not like they “forged” (to use your charged language) this new market thanks to piracy.