Most of us in the Cloud Services are aware of the cartoon that shows two disheveled men sitting on a park bench, discussing their life journeys. One is asking “how did you end up in poverty? Drugs or Gambling?” to which the other replies “I left an EC2 instance on”. The underlying idea is very clear – we can use AWS resources as much as we want and we will pay for what we use. The keyword here, however, is “use” and how we use, matters. And in Cloud Technology terms, use is the same as uptime. So if an instance is on for a 24 hour day during which two users connected for a half hour each, we would understand the same in terms of CPUS usage of the virtual instance and say it is one hour. But for the cloud service provider it is a 24 period of VM instance being up on their server, so it would be considered 24 hours – fair and square.