For example, in some countries it is acceptable to sell a software product without warranty, in standard GNU GPL style (see articles 11 and 12 of the GNU GPL version 2), while in most European countries it is not permitted for a software distributor to waive all warranties regarding a sold product.
* Tudi Stallman je uporabil non-copyleft licenco v določenih okoliščinah, kot so bile v primeru spremembe licence Ogg Vorbisa.