I have no real information about the cost of maintaining these sites. I really don't know the answer to that. The issue seems to be between different points of view. On the one hand you have CN coming at this from a seemingly commercial point of view, while on the other hand you have the rights of producer cars, shippers, to have access to sites being put forward. I think there is a very definite point being put forward associated with those rights.
On October 22nd, 2009. See this statement in context.