That's true but also not relevant to current wide spread use of the term. Concepts and common understanding evolve with language and I'm not even sure what point you're trying to make by pointing this out. Your first link even includes the language:
> "open source" marketed as trumping "open system".
Common use and understanding of the use "open" evolved decades ago.
Your comment also tries to side step the issue at heart people are annoyed and frustrated by. The founding principles of the OpenAI foundation laid out exactly what that usage of "Open" meant for their organization and they have since backtracked on their own principles.