Yes. In the heat of campaigns, TV media budgets are allocated for markets based on the number of local stations in each market of interest. Many of those buys are negotiated at the group corporate level. For example; Sinclair has something like 200+ stations nationwide in X-markets. Guaranteed that their national sales folks are negotiating rates based on a full spread of signals in at least their top 100 markets. The more stations, the more potential ad placement.
CarSales Guy could elaborate further if I missed anything.