Suppose I wrote a commercial program, and I publish its complete source code on my website. I retain all rights to the source code. No one gets any distribution or usage rights. They only have the right to look at the source code. My question is: can my program be considered "open source"? I mean, the source code is publicly available, in stark contrast to all the commercial software out there whose source code is not publicly available.
From my understanding, the source code of PGP used to be available for anyone to download. PGP is not free software. The source code was published by Symantec to facilitate peer review. Can PGP be considered open source software?
Note that I am not talking about source code leaks. I am talking about the case where source code is published by the copyright owner without granting anyone any distribution and usage rights.