In the LTV section, the reported revenue is the same as Total Revenue from the Business report (Includes all line item prices, discounts, shipping, taxes, and tips. It doesn't reflect refunds.)
This type of revenue is best suitable for the Lifetime value report since it’s more realistic than Gross revenue which doesn’t take into account discounts but is more stable than Net Revenue for long-term analysis. Namely, since Net revenue depends on returns, the recent Net revenue always seems artificially higher than the past net revenue.