Source: Bigstock

The great strength of the subscription business model is the steady income that recurring revenue provides. The ongoing relationship that companies form with clients becomes comfortable and, when the subscription becomes a part of the client's life, effortless. Well, usually effortless. When the newspaper ends up in the bushes one too many times, when the prescription by mail comes late and mutilated, when the fresh food box is leaking, when the website goes down ... then cust...