The issues are deeper than a question of virality.
> Can I apply a Creative Commons license to software?
> We recommend against using Creative Commons licenses for software. Instead, we strongly encourage you to use one of the very good software licenses which are already available. We recommend considering licenses listed as free by the Free Software Foundation and listed as “open source” by the Open Source Initiative.
> Unlike software-specific licenses, CC licenses do not contain specific terms about the distribution of source code, which is often important to ensuring the free reuse and modifiability of software. Many software licenses also address patent rights, which are important to software but may not be applicable to other copyrightable works. Additionally, our licenses are currently not compatible with the major software licenses, so it would be difficult to integrate CC-licensed work with other free software. Existing software licenses were designed specifically for use with software and offer a similar set of rights to the Creative Commons licenses.
> May I apply CC0 to computer software? If so, is there a recommended implementation?
> Yes, CC0 is suitable for dedicating your copyright and related rights in computer software to the public domain, to the fullest extent possible under law. Unlike CC licenses, which should not be used for software, CC0 is compatible with many software licenses, including the GPL. However, CC0 has not been approved by the Open Source Initiative and does not license or otherwise affect any patent rights you may have.
The other issues still exist; not everything is GPLed.
Particularly the license has been an issue getting through legal in older companies where it might not be whitelisted. Particularly with their FAQ still saying not to use it for software.
> Can I apply a Creative Commons license to software?
> We recommend against using Creative Commons licenses for software. Instead, we strongly encourage you to use one of the very good software licenses which are already available. We recommend considering licenses listed as free by the Free Software Foundation and listed as “open source” by the Open Source Initiative.
> Unlike software-specific licenses, CC licenses do not contain specific terms about the distribution of source code, which is often important to ensuring the free reuse and modifiability of software. Many software licenses also address patent rights, which are important to software but may not be applicable to other copyrightable works. Additionally, our licenses are currently not compatible with the major software licenses, so it would be difficult to integrate CC-licensed work with other free software. Existing software licenses were designed specifically for use with software and offer a similar set of rights to the Creative Commons licenses.
https://creativecommons.org/faq/#can-i-apply-a-creative-comm...