Sustainability in relation to OER is closely linked to the business model or approach that an individual, group or institution adopts to release, manage and support OER. It is not just about sustaining existing OER but about embedding processes and transforming practices to support ongoing OER production and release.[1]
https://bccampus.ca/2020/09/15/bccampus-open-education-working-group-guide-sustain-a-working-group/