Source Available means that the source code of this piece of software is available somewhere to download. So you are probably wondering - "Why is it an Anti-Feature?". Well, to make the software truly Free, it must give the users the <a href="https://gnu.org">four essential freedoms</a> to run, study, modify and share copies of the software. Many companies understand that people want source code for transparency or what-not. So they release it either with no license at all, or with a license that doesn't give the four essential freedoms. Trapping users in thinking that it's free software, while in fact it is not. Though we acknowledge that this is a good first step towards freeing this software. Without a Free Software copyright license, it's still not enough. This is one more reason why we should not say <a href="https://www.gnu.org/philosophy/open-source-misses-the-point.en.html">Open Source</a>, but say instead Free Software.