First, reCAPTCHA's purpose was to digitize books, not digitize them for public domain. If the work was copyrighted, it was returned to rightful owners. Second,

First, reCAPTCHA's purpose was to digitize books, not digitize them for public domain. If the work was copyrighted, it was returned to rightful owners. Second, if Big Mac got 2000% tastier every year, and while at that, 2 billion people got to eat dinner for free everyday, it sure will make the world better.