I've got a secret soft spot for American trucks (I love the F-150). Granted these RAMS are the bigger variants so probably wouldn't be useful off road on some of the tracks. Similar reasons to the Broncos when they first came out to Aus (struggling with width on tracks created by landrovers and land cruisers), but they might have a place especially hauling or long highway cruising. They may get more traction if they brought out the smaller 1500. The trim and equipment levels these things come with make Toyotas offerings look rubbish.
Wouldn't want to try and park one of these in Coles or Woolies though.