If there was a hard, fast rule, CC wouldn't have run a study to figure out what on earth "non commercial" actually means - http://wiki.creativecommons.org/Defin

If there was a hard, fast rule, CC wouldn't have run a study to figure out what on earth "non commercial" actually means - http://wiki.creativecommons.org/Defining_Noncommercial http://wiki.creativecommons.org/Defining_Noncommercial