Any OpenShift worker node requires an ODF subscription, not the infrastructure nodes. Reported by: ddemoiti https://access.redhat.com/documentation/en-us/red_hat_openshift_data_foundation/4.9/html/managing_and_allocating_storage_resources/how-to-use-dedicated-worker-nodes-for-openshift-data-foundation_rhodf#annotations:a0bc2b0d-e722-4078-8756-4c1eff849064