Pages 06–07 · Chapter 01 · Fit, products and economics
Know what a customer can cost.
A good campaign starts with a sustainable economic limit.
Economics before spend.
- The principle
- Before you buy reach, you determine the maximum price for a new customer. Product selection, pilot budget and a clear limit for potential learning loss follow from that.
- The limit
- A good score doesn't replace a known margin. An expected repeat purchase doesn't replace a documented additional customer contribution.
- Try it tomorrow
- Choose three suitable categories. For each, calculate the contribution after variable costs and write down the most important open assumption.




