Due to security updates, Linode (MSB's host) announced an upcoming downtime:
..."The following Linode(s) have now been assigned a maintenance window in which a reboot will occur. Please note that these times can change as a result of the actions mentioned above. At this time your reboot schedule in UTC is as follows:
- 2018-01-16 7:00:00 AM UTC
During the maintenance window, your Linode will be cleanly shut down and will be unavailable while we perform the updates. A two-hour window is allocated, however the actual downtime should be much less."
And now you know. Information is power!
Note, the linode I use to host games got taken down an hour early, FYI.