What is VCSP as compared normal Veeam Partnership?

While the typical perpetual per socket Veeam EULA (end user license agreement) limits usage of Veeam software to your own data, VCSP membership and licenses remove this restriction. So you can use Veeam products to deliver services to your customers. In short, if you are hosting Virtual Machines (VM)s for customers, you will need VCSP licenses.