DoD has purchased space capability as a service before. Whether it's to launch our satellites into space or supplement our military communication satellites with commercial communication satellites, DoD will purchase that capability as a service instead of procuring the rockets or satellites. The Space Force is now considering acquiring Space-Based Space Surveillance as a service. The sources-sought synopsis
states, "Tasks for SBSS as a Service include but are not limited to: maintaining health and safety of the space vehicle, executing on-demand space vehicle and payload operations, managing security and cybersecurity, and final system disposal and decommissioning." Space Systems Command SSC notes that many of the system’s critical design elements are proprietary, owned by Boeing and Ball Aerospace, and the government doesn’t plan to purchase the associated data rights. This effort could lead to yet another capability being procured as a service.