The way they handle global entry is unique to STT. No where else are you required to have the card with you to use GE. Normally it’s a KIOSK but regardless your GE status is displayed to the customs officials. SKyCaps seem to be allowed by customs to demand your cards which is really strange. Allowing SkyCaps to take non GE people through the GE and jump to the front of the line is again abnormal. I suspect there is more to this than meets the eye and customs officials might be getting some considerations in return for very special treatment of Skycaps. I will at some point file a complaint but suspect it won’t change anything.