Re:How many licenses can fit on the head of a pin? (Score 1)

...so coming up with a new incompatible licence for your software is a barrier to your software being adopted.

Well, thats an interesting statement. The horse has something to say on this issue (http://www.php.net/license/):

Q. Why is PHP 4 not dual-licensed under the GNU General Public License (GPL) like PHP 3 was?

A. GPL enforces many restrictions on what can and cannot be done with the licensed code. The PHP developers decided to release PHP under a much more loose license (Apache-style), to help PHP become as popular as possible.