Couple of answers here ... we're going to continue accepting orders for the time being since it shouldn't take much work to keep the service running as-is for the moment.
If it does shut down, will I get a refund for my remaining days?
If we decide to stop running the service, we won't be shutting it down until everyone's contracts have expired so don't worry about that.
I only have 9 days left, can I renew at all? What's even the procedure for renewing a server so there's no interruption in service?
You can renew but only once you receive the reminder email which you should get when there are 5 days left on your contract.