It's not just Amazon who wants to deliver small things across an expanse.
Your factory needs a special tool delivered to Location #16. That specific location is one of your many pre-set waypoints on your flight plans. You load the tool take a pre-set route free of conflicting air traffic and lower it to a waiting hand. Your platform allows you to see and hear everything as you act.
A piece of farm equipment shears a bolt in the field. Within minutes, a new bolt and related wrenches, lubricants, lock-washers, are on their way out to your location at 65 feet per second, along with a nice fresh sandwich.
Your large distribution center needs more straps at bay 25, so rather than sending a person to get them at the other side of the 3-building complex and return, the supplies-drone and Platform fly out and around to drop them at the nearest door to the need.