What were they thinking...

Don't you just love it when you buy a piece of gear and there is a clip, toggle, snap, or some other type of fastener somewhere that seems to have no purpose? I've had a Eureka! K2-XT tent for a couple years now, and there are toggles on the bottom corners of the hooped vestibule door. Does anyone have any idea what these would be used for? They obviously are not intended to hold the door open as there are ties for that at the top of the door. Are they on other expedition tents?