For the SaaS provider, the potential advantages of becoming a Payment Aggregator can be compelling. The Payment Aggregator model can seem very attractive, both for ease of onboarding and potential revenue generation.
Payment Aggregation, or Payment Facilitation (Payfac), allows a SaaS company to act as a master merchant for its users. The SaaS provider onboards its clients via a fairly non-intrusive application process, and this easy, fast onboarding makes it simple for the SaaS company’s users to begin accepting customer payments very quickly.
Payment facilitation is the process by which one entity, a master merchant, processes or facilitates payments on behalf of a base of sub merchants. 
For the SaaS provider, the potential advantages of becoming a Payment Aggregator can be compelling. The Payment Aggregator model can seem very attractive, both for ease of onboarding and potential revenue generation.