Running Shopify is straightforward. Running Shopify plus Amazon, or Shopify plus a couple of ad platforms, is where the math gets messy. If you're searching for ecommerce analytics for a Shopify brand on 2 plus channels, you've probably already hit the wall: Shopify admin tells you what happened in your own store, and nothing about blended CAC once Amazon, Meta, or TikTok Shop enters the picture.