Somewhere between $3M and $10M, every DTC brand hits the same wall. The spreadsheet that used to work on Sunday nights stops working. The Shopify dashboard tells one story, Meta Ads Manager tells another, and Amazon Seller Central tells a third story that doesn't match either. By the time you're running real ad spend across multiple channels, you need an actual ecommerce analytics stack for a $10M brand, not a collection of logins and a prayer that the numbers line up by Friday.