Connect Cognitive Services subscription to enable unlimited skillset execution

Starting December 21, 2018, you’ll be able to associate your Cognitive Services subscription with an Azure Search skillset. The skillset execution will be charged as part of the Cognitive Services subscription. On December 21, 2018, we’ll also begin charging for image extraction as part of our document-cracking stage. Text extraction from documents will continue to be offered at no additional cost.
Source: Azure Roadmap