Enterprise edition should state that the customer should request a new license with Heartbeat disabled should they wish to disable it.
What is sent?
The anonymous data transmitted by the repository includes the Alfresco Content Services version number, number of items in the repository, the size of a cluster, and the number of active users. Information about feature usage including content models, workflows, Smart Folders, and APIs are also sent. Other products will also share anonymous data necessary for Alfresco to understand their usage.