Earlier quoted context omitted.
But why "broken" instead of "down for scheduled maintenance"? The latter implies continuance of service, the former leaves that open.
“Down” used in that sense is computer jargon. “Broken” is universally better understood, at the small cost of some accuracy which doesn’t matter to the customer.
People have said "the phone lines are down" for years, meaning landline phone service was temporarily unavailable (often when no actual physical cables were knocked down off of poles, etc, though that might be where the use of the term originated in that case).
I'm sure there are plenty of other examples of using 'down' to mean the same kind of thing (all of which predated computer use being common in a regular person's life).