The page
<a href="http://www.gnu.org/licenses/why-not-lgpl.html">
http://www.gnu.org/licenses/why-not-lgpl.htm</a> argues that one
should use the ordinary GNU GPL, which prevents commercial
exploitation.
However, I have chosen to use the lesser GNU GPL, which allows
commercial exploitation.
Since I am a big Matlab fan, it would be hypocritical of me to try to hinder
the development of commercial software.
However, I  am also deeply appreciative of such excellent free software as
Latex, Emacs, R, etc.