Why would one want their Heroku instance to stay awake at all times? If the request is processed with a slight bit of latency, I'm okay with that. Plus, it help

Why would one want their Heroku instance to stay awake at all times? If the request is processed with a slight bit of latency, I'm okay with that. Plus, it helps the Heroku guys manage their infrastructure and cut costs in terms of unused computation time. This feels like taking advantage of the good will of those providing the service.