Craig Hockenberry, writing on The Iconfactory blog:

We’re not in this business just to make money: all of us at the Iconfactory hope that our products will make people’s lives better. We’ve worked hard to make Twitterrific work well with the accessibility features in iOS. Hearing that these efforts make things easier for customers with disabilities is rewarding beyond words. (Listen to the podcast file in that last link to get a great idea of what life is like for a VoiceOver user.)

But now there’s another incentive for thinking about accessibility: helping others also helps your downloads […]

Implementing features that make an impact is also a good business. Twitterrific and Workflow are great examples.