In many sub-Saharan African countries, stockouts and supply chain bottlenecks are a daily challenge, particularly in the healthcare sector, where they can significantly impair service quality and, in the case of blood supply, prevent life-saving medical interventions. Although detailed ethnographic research has been conducted with a focus on specific sites, such as oncology wards (Livingston, 2012) or hospitals (Umlauf & Park, 2017), there has been no research to date that analyzes this phenomenon and its effects along one specific supply chain across different sectors, such as education and health. This colloquium text will discuss how stockouts affect donor recruitment practices in northern Ghana across three distinct sites: secondary schools in Tamale, the Tamale Teaching Hospital, and Zipline’s drone center in Vobsi. Drawing on ethnographic fieldwork, including semi-structured interviews with health masters, donor recruiters, laboratory technicians, health managers, supply chain managers, and drone operators, this chapter investigates how these sites are connected through donor incentives, and what forms of incentive are considered appropriate against the backdrop of stockouts. I argue that the emergence of refreshments as a specific type of incentive is shaped by stockouts across sectors, as both health practitioners and student donors view refreshments as vital to boost the replenishment of blood after donation, which is critical due to an ongoing food crisis at schools. However, this practice carries the risk that the normative requirement of voluntariness in blood donation will be undermined in the long run due to the exertion of various kinds of pressure on students.