The article conflates the true meaning of "open source" with "open" and relating it to "closed source". "Open Source" as term is derived from free software definition just as it says on your main article page.

But explaining to people how proprietary database is also called "open" only adds to confusion!

Dataset or not, it should be under same terms as free software. Forget the often abused word "open" and stick to clarity. Advice is for everyone.

What is Free Software? - GNU Project - Free Software Foundation
https://www.gnu.org/philosophy/free-sw.html

And "Open Source" has its definition too which is aligned to free software:

The Open Source Definition – Open Source Initiative
https://opensource.org/osd

There is reason why free software community does not use word "open" because it is misused and abused, while not giving to user the actual freedom.

Word "Open" as in "Open Source" - Words to Avoid (or Use with Care) Because They Are Loaded or Confusing
https://www.gnu.org/philosophy/words-to-avoid.html#Open

Please refrain from using "open" or "open source" as a synonym for "free software." These terms originate from different perspectives and values. The free software movement advocates for your freedom in computing, grounded in principles of justice. The open source approach, on the other hand, does not promote a set of values in the same way. When discussing open source views, it's appropriate to use that term. However, when referring to our views, our software, or our movement, please use "free software" or "free (libre) software" instead. Using "open source" in this context can lead to misunderstandings, as it implies our views are similar to those of the open source movement.

Proprietary databases calling themselves "open" or META calling LLAMA "open source" is just bad attempt to enter into the community of free software makers. And many people follow it blindly.

Deepseek has done more for this civilization then META. Let us not be deceived by those corporations.