The EUDAT project has released the EUDAT Sustainability Plan.
Here's an excerpt:
We survey the current provision of infrastructure and long-term data archival services in Europe and review recent efforts to assess the costs involved in preserving research data (Chapters 1 to 4). To focus and constrain sustainability planning, we introduce a number of candidate guiding principles for EUDAT (Chapter 5) and suggest an overall logical model of its future shape, and a number of possible mechanisms for realising this model (Chapter 6). We discuss possible mechanisms to define levels of service and provide funding for a future EUDAT CDI, and introduce our intent to measure actual costs of delivering EUDAT services through an activity-based cost modelling exercise (Chapters 7 and 8).