There was a time when acquiring an e-commerce customer was almost embarrassingly cheap. In the early days of DTC, brands like Warby Parker, Dollar Shave Club, and Casper were rewriting the rules of retail. They were acquiring customers for as low as $10 or $15 through Facebook ads. Dirty Lemon, a beverage brand, was spending $20,000 to $30,000 per day on Facebook and Instagram and acquiring customers profitably. The math worked on the first transaction. You spent money, you m

It's tempting to look at your business as a collection of individual metrics. CAC over here. AOV over there. Contribution margin in one report, retention rate in another. But your business doesn't work that way. It's a system—a network of interconnected levers where every change ripples through everything else. Lower your CAC and you might be acquiring worse customers who never come back. Raise your AOV and you might slow down purchase frequency. Improve your contribution mar