on non-commercial licenses

From an essay by Erik Moeller on the Creative Commons Non-commercial license:

Any market built around content which is available for free must either rely on goodwill or ignorance.

The potential to benefit financially from mere distribution is therefore quite small. Where it exists due to a predominance of old media, it is likely to disappear rapidly. The people who are likely to be hurt by an -NC license are not large corporations, but small publications like weblogs, advertising-funded radio stations, or local newspapers.

Indeed, to make a substantial profit with your work, a company will have to provide added value beyond what is available for free.