One case in which dropping copy protection improved sales.
It’s been 18 months since O’Reilly, the world’s largest publisher of tech books, stopped using DRM on its ebooks. In the intervening time, O’Reilly’s ebook sales have increased by 104 percent. Now, when you talk about ebooks and DRM, there’s always someone who’ll say, “But what about [textbooks|technical books|RPG manuals]? Their target audience is so wired and online, why wouldn’t they just copy the books without paying? They’ve all got the technical know-how.”So much for that theory.
Addendum: see the comments below for good reason to dismiss this particular datum.