From: http://creativecommons.org/weblog/entry/17127
"The majority of respondents (87% of creators, 85% of users) replied
that the definition was “essentially the same as” (43% of creators,
42% of users) or “different from but still compatible with” (44% of
creators, 43% of users) theirs. Only 7% of creators and 11% of users
replied that the term was “different from and incompatible with” their
definition; 6% or creators and 4% of users replied “don’t know/not
sure.” 74% and 77% of creators and users respectively think others
share their definition and only 13% of creators and 11% of users
wanted to change their definition after completing the questionnaire.
On a scale of 1-100 where 1 is “definitely noncommercial” and 100 is
“definitely commercial” creators and users (84.6 and 82.6,
respectively) both rate uses in connection with online advertising
generally as “commercial.” However, more specific use cases revealed
that many interpretations are fact-specific. For example, creators and
users gave the specific use case “not-for-profit organization uses
work on its site, organization makes enough money from ads to cover
hosting costs” ratings of 59.2 and 71.7, respectively."
Study home page
http://wiki.creativecommons.org/Defining_Noncommercial
Press release
http://creativecommons.org/press-releases/entry/17721
Direct link to the (18mb) full PDF
http://mirrors.creativecommons.org/defining-noncommercial/Defining_Noncommercial_fullreport.pdf
ivan