The service disruption of the hosted landing pages was caused by a hardware failure at our cloud hosting provider. When this occurred, the affected services where immediately automatically routed to other hardware running online. This automated re-routing only lasted less than a minute.
The period that the hosted landing pages were unavailable was during the time that the disrupted endpoints were being re-mounted and restored to the new hardware.
In general, physical hardware failures at our cloud hosting provider are extremely rare but not never. We are looking into how we may add more fault-tolerance to our platform so that our services may recover more quickly in these cases.