Can the owner of an open source Github repository later decide to close it? What about other people\'s contribution to that project?
Edit - several peop
It depends on the license. If it's BSD or similar, then yes, it can be close-sourced from a future point in time, incorporating third-party contributions (because the license allows it). (Any code released before the source is closed remains open under whatever license was chosen.)
If it's GPL, then any third-party GPL'd code can no longer remain in the closed-source repository, unless a separate license to use it in a commercial, closed-source application is granted by each and every third-party author.