Sounds like a slight case of all the ducks lined up in a row! Upgrade issues, slowest revenue day surges due to activity spike... Couldn't write it!A small site had a cost loss of $3k income because it took a bit longer to get everything setup than had been expected . Think the 'downtime' was 1.5 or 2 days, and we considered rolling back because we ran into an issue that did not come up in the ~6 months of testing.
This was on a Tuesday-Wednesday, which normally makes less income than the weekend but also lined up with a surge in re-activity.