That's a fair question as Bushcrafter's tend to re-purpose all kinds of items for their needs, my new camp grill for example was once part of a vegetable rack.PS. Any point of clipping carabiners to your pack apart from looking tactical?..
UK Ramblers tend to carry one or two for getting over barbed wire livestock fences where the landowner has not put in a stile. It gives you an instant third hand to clip down the top wire to a lower one and reduce any chance of a nasty groin injury while you clamber over. American hikers have a nice technique for suspending bear bags and lanterns between trees that uses a carabiner that can be equally employed to erect a large group tarp or parachute shelter. Many folk also like to bungee their pack to a tree to keep it off the ground and a carabiner or two provides any easy place to hook on. Other uses include... adjustable pot hanger, small tarp and hammock rigging, impromptu hammer/knuckleduster and fishing weights.