سلام..
تا جایی که اطلاع دارم تقریبا دو مدل license نرم افزار open source داریم.. Copyleft licenses و Permissive licenses.. همه ی license های open source از نوع اول نیستن.. تفاوتشون..؟
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Where copyleft licenses differ from so-called "permissive" licenses is that copyleft licenses require these same rights to be included in any derivative works. I prefer to think of the distinction in this way: permissive licenses provide the maximum freedom to the immediate downstream developers (including the ability to use the open source code in a closed source project), whereas copyleft licenses provide the maximum freedom through to the end users.
https://opensource.com/resources/what-is-copyleft (https://opensource.com/resources/what-is-copyleft)