What downtime actually does to a small product, and to the people who trusted it.
What to write to a client when their site goes down: four sentences, sent immediately, plus the follow-up and the write-up afterwards.
If your app was down for an hour, your Google ranking is fine. At two days, pages start dropping. Here's where the line is and how recovery works.
An hour of downtime rarely costs an hour of signups. What it costs depends almost entirely on who was trying to visit while it was broken.