[rewmie]

> Which strongly suggests they hadn’t considered such a load test on their own.

Not really. GitHub has been around for over a decade. People bother with problems that have a realistic chance of happening. If GitHub didn't bothered to rate limit commits it means it was a potential issue that didn't manifested itself for over a decade.

People tend to bother about problems that happen. Otherwise everyone would be freaking out because of killer asteroids.