cPanel and WHM give you all the power you need when managing multiple sites, domains and clients. Create as many cPanel accounts as you need within WHM's account dashboard, assigning the cPanels to each respective property. Once set up and assigned, you can view usage, manage account stats, modify, upgrade or suspend accounts and much more. This allows you to manage your server exactly how you want it, including splitting your clients up for billing, resource and support purposes.
Let's take Cloudrino as an example. This Indian startup claims to give you a free VPS. To get it, you need to stay in line - the issue is, the line has apparently, over 230 thousand users in it. And it's not moving very fast! However, to get ahead of the line, you can invite your friends to join the line as well. Like that, you can jump some positions.

Typical Use Case: Early stage startup workloads, quick prototypes, prelaunch experimentations, dev/test environments, microservices node, code repositories, dedicated application servers for light workloads. Resource intensive workloads like data aggregation, gaming front-ends, video encoding, high performance computing, batch processing. Also see our managed services for Startupreneurs.