LTV is why subscription businesses can afford high CAC. A one-time buyer at $50 is worth $50. A subscriber buying 12 times a year is worth $600 — totally different acquisition math.
Even 1 extra repeat purchase can completely change your unit economics. If CAC is $30 and profit per order is $20, one purchase loses money — but two purchases makes it profitable.
Focus on increasing purchase frequency before increasing AOV. It's easier to get an existing customer to buy again than to convince them to spend more per order.
Email marketing is the highest ROI channel for improving LTV. Post-purchase flows, win-back sequences, and loyalty campaigns cost almost nothing compared to paid acquisition.