Why isn't the Executive Summary report attributing my gift card revenue?

Gift card revenue is not counted towards revenue because revenue from gift cards is considered deferred revenue. To analyze gift card revenue you can use the Payment Gateway filter on the Orders Deep Dive module. Revenue from gift cards will be tracked when the gift cards are spent.

Additional Note: First-time orders which include only gift cards are not counted as new customers by Shopify, but will be counted as new customers by SourceMedium.