Though it was about generating millions in economic value for the UK via the public domain and Creative Commons, there was a 3/25/2015 article I saw that could also apply millions to the U.S. market. It is about promoting the public domain and Creative Commons. Sure, a potential 9-figure covers a lot less than a more necessary 12-figure range, at least it is covering somethings. Heck, that article actually goes with the issue I would be a political activist for.
The article is called "A healthy public domain generates millions in economic value – not bad for ‘free’" and was written by Kristofer Erickson for the rickson is an Associate Professor in Media and Communication at the Univ. of Leeds (in West Yorkshire, England). He wrote the article for a news website whose HQ is in Melbourne, Australia.
About the site: per its Wikipedia page, "The Conversation is an independent, not-for-profit media outlet that uses content sourced from the academic and research community. Since the Australian website's launch in March 2011, it has expanded into six editions, with the addition of a United Kingdom (UK) version in 2013, United States (US) in 2014, Africa in May 2015, France in September 2015, and Global in September 2016. The Conversation publishes all content under a Creative Commons license and, as of May 2017, reports a monthly online audience of 5.2 million users onsite, and a reach of 35 million people through creative commons republication."