Net sale of a publication, that is actual number of copies sold. Less than readership. Audited net sale figures certified by audit bureaus (not all countries have one).
The Mathematics of Direct Sales and Performance Marketing Profitability: How to Make One-Shot and Subscription-Based Products and Services Viable
Before you even begin to think about the detailed techniques of performance marketing and selling your product or service directly – the market, the design of the material, the method of order fulfillment – you …