The Monorail at Disneyland was once an E-ticket attraction, because it is an attraction within the park. Park admission is required and its listed on the park maps as an attraction (similar to the Railroad or Friendship Boats). A couple years after opening it was expanded to include a station at the Disneyland Hotel, but it has always required park admission (and an additional attraction ticket in its early days) to ride. Yes, it has multiple stations, but it's a real stretch to claim that it's really a "transportation" option; it's almost always faster to walk than to ride.
The monorail in Walt Disney World has always been part of the transportation system entirely separate from park attractions. In the early days it required a Transportation ticket to ride, which was distinct from park admission or the attraction tickets that were used within MK. If WDW's system is being counted, then you should also include the various buses, boats, and parking lot trams (and future Skyliner), but that's all a real stretch.