I know exactly how a license works. The GPL in its wording frustrates the distribution of free and open software precisely in its requirement that all derivativ

I know exactly how a license works. The GPL in its wording frustrates the distribution of free and open software precisely in its requirement that all derivative works by default must also be GPLed. This frustration is amplified when one wants to use a mutually incompatible license, like the CDDL. So yes, a license that makes it hard to cooperate with others is infective and judging by how many companies have avoided the GPLv3, is ineffective as well in encouraging sharing.