When analyzing customer churn, why is it necessary to compare the cost of customer acquisition to the customer lifetime value to determine a startup's viability?

Customer acquisition cost, or CAC, is the total amount of money a business spends on marketing and sales efforts to gain one new customer. Customer lifetime value, or LTV, is the total net profit a business expects to earn from a single customer over the entire duration of their relationship. Comparing these two metrics determines startup viability because it reveals whether the business model is financially sustainable. A startup is only viable if the LTV exceeds the ....