Tell me more about the SEOClerks subscription payment

Tell me more about the SEOClerks subscription payment

I'm confused over what a subscription payment is. Can someone explain this to me? As a seller, what type of services could I use subscription? As a buyer, when would I want to subscribe to a service? For instance, would you subscribe to a social media service, such as 100 views to a Youtube video daily? Would that be a good example?

Thanks