In practice, open source stands for criteria a little looser than those of free software. As far as we know, all existing released free software source code would qualify as open source. Nearly all open source software is free software, but there are exceptions.
First, some open source licenses are too restrictive, so they do not qualify as free licenses. For example, Open Watcom is nonfree because its license does not allow making a modified version and using it privately. Fortunately, few programs use such licenses.
I’m not sure the GNU play project or FSF are the best source for a definition on open source, as they don’t “agree” with open source. Same reason a capitalist might have a very dubious definition of communism, at least comparing it to how actual communists might use the word
Not everyone agrees:
https://www.gnu.org/philosophy/open-source-misses-the-point.en.html
Of course they don’t qualify as free licences but they are still open source
Yes, that was my point.
I’m not sure the GNU play project or FSF are the best source for a definition on open source, as they don’t “agree” with open source. Same reason a capitalist might have a very dubious definition of communism, at least comparing it to how actual communists might use the word
GPL only guarantees the source for customers.
Companies just post it because it’s easier than mailing it out on request.