One of the biggest things I worked on for Digital Bible Society was the absolutely massive amount of unique bible covers for huge sections of public domain bibles that have been out of print for decades. This would cause groups that had a translation of the bible to not be able to attain one, making translator's work go to waste. But with the invention of limited print runs, also known as Print-on-Demand, allowing them to be made on a case by case bases making small groups be able to get them cheaper.
Print-on-Demand Bibles at the Digital Bible Society