The train is already going past the existing station, so I would imagine the additional cost of supporting the station for the two times a day the train stops t

The train is already going past the existing station, so I would imagine the additional cost of supporting the station for the two times a day the train stops there is relatively small - additional brake dust in the air, some extra energy burned. It wouldn't surprise me if the accounting/management, HR and maintenance overhead for the station was higher than the cost of having the train make an extra stop twice a day. It is a little surprising the station appears to be staffed based on the picture of the train schedule, but there is something to be said for producing that extra job. I am sure the station master who resides in that office is really happy it still exists.