Assertion: free preview | /r/CapableOf | involve both the hbo channel slate
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text: With digital cable having become commonplace since the early 2000s, most cable and satellite providers have since eschewed using local origination channels to carry free preview events and no longer produce interstitials for events involving premium channels; instead, providers simply unencrypt the service's signal on the designated channel slots of the main channel and all related multiplex channels that are carried by the provider as well as in some cases, a related pay service (for example, in the United States, HBO offers free previews either involving only its eight-channel multiplex, or both the HBO channel slate and the seven-channel multiplex of its sister network Cinemax, depending on which service is offered during that given preview –