No, "Open Source" is <i>not</i> "just that". This word combination has a specific meaning, not equal to a simple sum of these words. Similarly, "sparkling water", "hot dog", or "heavy metal" have meanings distinct form the simple sum of the meanings of constituent words.<p>The notion of "Open Source" has an agreed-upon definition, understood widely within the community of software development practice: <a href="https://opensource.org/osd" rel="nofollow">https://opensource.org/osd</a><p>By the same token, "Free Software" has a specific, narrow meaning: <a href="https://www.gnu.org/philosophy/free-sw.en.html" rel="nofollow">https://www.gnu.org/philosophy/free-sw.en.html</a><p>What would you tell a person who would peddle you deep-frozen apple juice as "hard cider", because it's technically cider, and is undeniably hard?<p>(While at it: I must praise the choice of the font on the page, super clean and legible. It's Lexend, freely available from Google Fonts.)