mmm..... "Every ship that transits brings plenty of money".  ( WesternPatriot)
I often wait on my way to work while those giant trains with engines at the front, middle and end pass by, and I see an awful lot of Canadian Tire containers as well as tanker cars.  All that stuff coming in from China to the CT stores is money and jobs leaving Canada. I suspect the returning tanker cars may be carrying imported diluent that is used to make dilbit, but they might be empty.