The business models of digital maker-entrepreneurs in open design are inextricably linked to the broader open design community. Digital makers share designs on online platforms such as Thingiverse and use digital manufacturing technology such as 3-D printing as a generative mechanism for their entrepreneurialactivities. There is a general understanding of how sharing works in that community and the basic design parameters that determine the business models of these digital maker-entrepreneurs, which are based on a portfolio of activities. This study is based on in-depth interviews with 11 digital maker-entrepreneurs from the open design community. We investigate the activities that constitute their business models using activity theory as a lens with which better to understand them. This study provides a perspective on the complexity of the relationships in which these activities are embedded and analyzes the activities related to the production, distribution, and consumption of value. Finally, we examine the exchanges between digital maker entrepreneurs in the community, shedding light on how digital maker-entrepreneurs share and exchange goods, services, and knowledge as peers.