The issue identified in this blog post has been resolved as of 0730AM USA PST.
Queued requests for CTP orgs that have made subscription changes will get processed through the automated system retries, likely over the next day.
For any remaining issues that CTP customers may have with subscription changes they made in the last 12 hours, they should see if they are resolved tomorrow through automated retry logic. If not, they can contact CRM Online support for assistance. The CRM Online support teams can assist and will escalate further if required.
Thank you