Report that fair use generates $4.7 trillion in economic activity
arstechnica.com
arstechnica.com
That is does not paint a very good picture, and when looking into the actual report and what industries are considered: "...rise of the digital economy, as fair use permits a range of activities that are critical to many high technology businesses, including search portals and web hosting."
I would bet that any user-generated content website is considered, and who knows what else.