I agree that there might not have been concrete reasons for the API to exist (especially considering PayPal has their own API), but shutting down the API with no warning or migration plan was a mean move. Even if the only projects using it are small I still think the developers of them deserve some warning. They still worked hard on those projects and are probably proud of the work they did.
Stat #3 might derive from the fact that a person is more likely to survive a crash with a helmet on. If someone dies because they aren't wearing a helmet it will be reported as a death, but if they almost die and the helmet prevents death but they receive some brain damage then it will be reported as a brain injury.