It was found that after upgrade to OAP version 7.1+ usage of CPU RAM and Bandwidth resources for OACI VPS NG subscriptions is shown as '0'. Other resources, like diskspace and consumed backup space are reported correctly.
Is that expected behavior for newer OAP versions?
Yes, this behavior is expected since OAP version 7.1. This change was made to allow adapt OAP to recent BA features integrated in newer BA versions.