In 2016, Australia held its first online-first national census. Unsurprisingly it was a complete disaster, and the government told us the system was the victim

In 2016, Australia held its first online-first national census. Unsurprisingly it was a complete disaster, and the government told us the system was the victim of a DDoS attack right around dinner time for the east coast. They also told us they expected around 10 million participants and that during capacity planning they took the expected 1 million submissions per hour and doubled it to be safe, i.e. that a bunch of statisticians thought that 10 million people would form a uniform distribution over a day rather than spiking when they get home from work.