My guess is DR is baked into their infrastructure.
Do we know if we are on a Virtual Server?
Most VM software (like VMWare) is really easy to setup along with a VM-backup tool. Something that takes daily backups of the VM. Then, if anything goes wrong - the previous day's (or, say, a week ago's) backup is simply loaded in and things carry on. In this scenario, you would lose "1 day" (or 1 week) of data.
SQL databases generally have their own backup-creating tools to dump backup data too. These are easily restored as well.
I agree that they likely have such things incorporated automatically at this point.
But, on the other side, it wouldn't be a shock if they attempted to charge extra or otherwise limit access to such "upgrades."