They're still in business, so they're still using product. Could be a transload ten or a hundred miles away on another railroad. Whatever the reason, it means that some other vendor is providing a better product than the serving railroad. You can keep your ice cream shoes on to start finding the solution. First, determine the exact nature of the competition and why it's perceived as a better value.
Chances are the price is higher but the landed cost is less.
So a shift to a transload terminal off the serving road doesn't necessarily mean somebody's out beating the short line's price. What it does mean is that the transload offers better value. If the serving railroad had the business once and then lost it, there has to be a reason. Now it's time to take off those ice cream shoes and find out why. Walk the area and see how the railroad process fits the customer's production process.