This study really makes some interesting points, e.g.:
"More specifically, our study suggests that massive social harm was done by the most recent copyright term extension that has prevented millions of works from falling into the public domain since 1998." p. 29
2015-02-05 18:27 GMT+01:00 Stéphane Coillet-Matillon < stephane.coillet@mail.wikimedia.ch>:
*tl;dr: *public domain works used as illustrations increase traffic and would cost about $250 millions a year to the project had they been copyrighted.