EC2 Spot Marketplace
A Spot Instance is an unused EC2 instance that is available for less than the On-Demand price. Because Spot Instances enable you to request unused EC2 instances at steep discounts, you can lower your Amazon EC2 costssignificantly. The hourly price for a Spot Instance is called a Spot price.

DevOps and Platforms extensively utilizes the Amazon spot instance marketplace to purchase excess capacity.
Each client owns their own private VPC locked down with state of the art encryption, firewalls, and advanced uptime monitoring.

ACCORDING TO WIKIPEDIA
The best part isn’t that spot instances cost so much less. Its that you get to overpower your apps with extra large hyper discounted super servers and not have to pay an arm and a leg for it.