Why Allow Commercial Development?
The open source community is divided into several different legal categories.  Approximately two thirds of it believes in the GNU General Public License concept.  The GNU GPL, as it is called, restricts the ability of commercial use of the software, requiring that the same license, the GPL, be used on all derivative works.  While this may have good intentions, it's simply not practical for commercial developers to make their source code publicly available.  The Quantix developers believe that commercial development is a healthy use of the software created as long as credit is given to the developers.  That is why the BSD license was chosen for this project.