[gipp]

The AWS example is really the same thing (making multiple identical requests is the same as one request), just explained very poorly. Further down:

> If you launch your instance using run-instances (AWS CLI), ec2-run-instances (Amazon EC2 CLI), or RunInstances, you can optionally provide a client token to ensure that the request is idempotent. If you repeat a request, the same response is returned for each repeated request. The only information that might vary in the response is the state of the instance.

These are also both the same as the original mathematical definition. You're right about term overloading in the general case, but this isn't really an example of that.