I want to know the following:Can open and closed exist in terms of a specific module being closed? What licences allow this?What licence is used for paid modules for, say, Prestashop?Can an open and closed source version of software exist in parallel? I imagine that code can't be ported from open source but perhaps the opposite is possible?What becomes of intellectual property? I imagine that the software becomes the property of the community.Can project analysis documents be packaged along with software on Github or should these be kept separate?What advice can you give in terms of the commercialization of associated services?Thanks in advance.
Can open source and closed source co-exist?
license compatibility;license recommendation;software;closed source