So what can we conclude from all this? Both license models make software free, but only GPL software is sustainably free. The BSD gives greater freedom, the GPL gives more freedom. Choose which one you value more.
http://www.matusiak.eu/numerodix/blog/index.php/2007/12/15/gpl-vs-bsd-a-matter-of-sustainability/
Also, might I add that 'free' does not always mean 'with no cost'. There is potential for cost to be incurred with GPL'd software (for example, RHEL or SuSe Enterprise). Likewise, when Lincoln 'freed the slaves', he did not make them available for zero cost.