I noticed something during a road trip in July to Monterey (whose lobby also has this display)
Having charged a few times at Monterey and looking at their monitor, Fountain Valley (always very busy, 16 stalls) was consistently on the top 10, yet both stops at Kettleman on the way up and back did not show Fountain Valley. Maybe it was time of day, and unfortunately I did not take pics, but I definitely remember thinking they weren't consistent as I'd expect, Fountain Valley stood out to me but other locations were also always on one but not the other.