shadowbox is not GPL, nor GPL-compatible

I was attempting to convert Corporative Site's drush make file to one suitable for the new Drupal.org packaging script. One of the things it dies on is http://www.shadowbox-js.com/ which is not part of list of allowed third-party libraries at http://drupal.org/packaging-whitelist.

I went to add it, except that the license for this is some kind of weird custom license that specifically forbids commercial use. This isn't in line with the GPL, and should be replaced with a GPL-compatible library instead.