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 == Re: Copyright Commercial, Non Commercial == 

 Hi Bernard, You are exactly right. Someone can take any material, text or pictures from Wikipedia or Commons, and then publish them on their books/website/apps and make profit out it. That's really what open source is. For example, Linux is free and open-source, Red Hat has created a version of Linux that is sold for profit. Wikipedia and Commons are free to use for both non-commericial and commercial purposes. —   "