As the number of prints being made declines, photo retailers seek new business models to make up the lost revenues. This paper provides some insights into the wide range of personalized photo products that can be produced to achieve this goal.
Don Franz, "High Margin Output Opportunities in Photo Retailing" in Proc. Int'l Symp.on Technologies for Digital Photo Fulfillment, 2014, pp 7 - 8, https://doi.org/10.2352/ISSN.2169-4672.2014.5.0.7