You can blame the e-commerce giant Amazon for the pain that some small businesses are feeling as a result of Amazon’s decision to offer standard free shipping on most orders.
Net Promoter Score is BS due to sampling bias. When a subset of a population is used to extrapolate generalizations about the entire population it is wise to make sure that your sample population properly represents the entire population. If your sample does not represent the population that you wish to understand more about than the data is useless.
From subscription boxes like Birch Box to mobile phone service like AT&T, the subscription business model spans across many industries. The fundamentals of this business model are simple, but it takes some analytical rigor to truly understand your subscription business.