The demo convinces, the workspace disagrees. In Microsoft Fabric the ontology is now a real item: a REST API, a definition in files and a child graph created on its own — and it is that child that issues the bill. This article gathers what the item really is, why every refresh is full and freshness became a cost decision, the four capacity meters, how far binding actually reaches, three points where the official documentation contradicts itself — and what has to be in place before switching this on in production.