There's an interesting situation with the likes of Photoshop, where the software being pirated actually increases its market usage, and the software becomes the de facto standard, in part due to software piracy.
In the instance of Photoshop for example, it's likely that people creating funny doctored ('photoshopped') images and spreading them via the internet, were using pirated Photoshop software.
Here's a Life Hacker article on it.
What it means, is that especially for a creative software like Photoshop, or Ableton (music production software), the developers shouldn't make their copyright protection too strict. It should be easy enough to crack so that people can actually use it, but pain enough to get people to fork out if they're serious enough.
My question is - is this a well researched phenomena in economics?
Is there an optimal either pricing strategy, or copyright protection strategy, that takes this into account?