PageRain is a CDN (content delivery network) that provides only page load optimization by serving static content from a global network of nodes. The company has a stable Windows Azure based platform and is expanded to places where Windows Azure is not available. Using Internet Server as the foundation for helping static content, the company is based on tested and tried standard technology.
As any other company, their mission is to make money. There is no point in affecting otherwise. But, they believe the best way of making lots of money, is by providing an affordable and useful service and making sure that each and every one of their customers are happy.