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[Tsukino]

For a business, the "logical" fix is to affect as few customers with an outage as possible...

"An outage" is the key there. People aren't complaining about a single outage, they're complaining about all outages.

Taken one at a time, it makes perfect sense to affect the least number of people. Taken on the whole, it's terrible customer service to affect the same group of people repeatedly when you offer a flat-rate subscription for a 24-hour service.