GEO makes a big deal about the lack of trucks coming through the filling bays, and shows some still photos of seemingly little used tracks, but didn't bother to place time-lapse cameras to record any activity the entrance to the rail spurs.
The trucks that come and go are probably running routes of less than 100 miles and are mainly to serve the local market. In addition, trucks are too small to service large users, like a power plant.
They couldn't possibly run enough trucks through each facility to generate the revenue they claim, but the rail spurs at each site can be used to send out oil as well as receive it.
If the area isn't littered with long distance pipelines to transport oil to other facilities, then over longer distances, it would make sense that outgoing rail cars would transport oil to smaller distributors, with LPH acting as a larger wholesaler. And only rail cars could service a power plant.
Regarding the "unused" look of the tracks at the sites, since spur lines are very low (walking) speed, even if you had 10-20 railcars/day coming in and out, it might not be enough to wear all the rust off the top of the tracks, and any fast-growing plants, unless cleared by workers, would quickly overgrow the tracks. I suspect that unless it's a safety issue, they wouldn't bother with it.
I would think that if Geo thought that a time-lapse video of inactivity at the truck bays would be damning, then a set of similar time-lapse videos of the rail filling/emptying stations would be doubly-damning.
So why didn't Geo do this as well?
Could it be that most of the activity at these facilities happens on the rail spurs, which are out of sight of the time-lapse cameras?