“ Applying this framework to the computer hardware industry, Nowinski and his team discovered that each Promoter was worth approximately $2,634. Promoters spend $203 more than the industry average of $1,615 and account for roughly one-half of a new customer acquired through positive word-of-mouth. In comparison, each Detractor can cost a business 0.84 percent of a new customer through negative word-of-mouth. The lost business associated with their negative referrals subtracts nearly the entire value of their purchase behavior, leaving a total customer worth for Detractors of just over $100, accounting for $2,500 less than Promoters. ”
Satmetrix Enhances HP Relationship Assessment Process (RAP)