The example used by Yohai Benkler in his great book “The wealth of Network”.
Scholarly lawyers have for long been writing articles for little or no money in order to get consultancy business from firms and individuals in their area of specialization.
This is perhaps the archetypical case showing that such models work has been around for a while even before the advent of the internet.
Free:
A scholarly article in a specialized area of law e.g. Criminal law, constitutional law or Tax law
Premium:
Services offered to clients in specific areas of law
More:
See more about Yohai Benklers great book on this page.
I especially recommend the second chapter: Some Basic Economics of Information Production and Innovation
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