The Services Provider License Agreement (SPLA) enables services providers and independent software vendors (ISVs) to license Microsoft® licensed products on a monthly basis, over a three-year agreement term, and use these products to provide software services and hosted applications to your customers.
 
While other Microsoft Volume Licensing programs, such as Enterprise Agreement, Select License, and Open License do not allow commercial hosting of Microsoft licensed products, the Services Provider License Agreement does give you the right to license Microsoft products for commercial hosting.