Sometimes you need to know how to deterrmine whether a project should be classed as Commercial on Non-Commercial. These articles will help with this important topic.

wiki.creativecommons.org/wiki/Defining_Noncommercial
Defining “Noncommercial”: A Study of How the Online Population Understands “Noncommercial Use” was published September 14, 2009:

mirrors.creativecommons.org/defining-noncommercial/Defining_...
Defining “Noncommercial” A Study of How the Online Population Understands “Noncommercial Use” report in a PDF from Creative Commons.

wiki.creativecommons.org/wiki/Frequently_Asked_Questions#Doe...
This links to the appropriate section in the Creative Commons Frequently Asked Questions page

www.thehelpful.com/creativecommons/what-is-commercial-use.ht...
This is a small article setting out the non-commercial clause in the Creative Commons License.