Genuinely trying to know if this is intentional to incorporate non-free open source software? If yes then why?
I don't have a definitive answer to your first question, but why would we want to limit a sub to FOSS-only discussion? It's a more restrictive designation. By calling the sub "open source" we're keeping it open to software that isn't technically FOSS.
I think a lot of people here actually mean foss when they say open source. Calling it foss might impart the right message and the importance of libre software to new folks. I am little conflicted about non-libre open source software as might be evident by now, maybe my bias is unjustified.
Yeah the distinction is pretty small, and usually people are just talking about FOSS software....but I'd rather avoid the semantics so just calling the community "open source" makes sense to me.
Incorporate? Meh. People just can discuss all types of open source software here, not only free of charge, fully libre, etc..
