"Selling something you haven't yet built isn't a crime btw." Wait what? Manufacturing companies do it every day. For a lot of them, their entire profit margin

"Selling something you haven't yet built isn't a crime btw." Wait what? Manufacturing companies do it every day. For a lot of them, their entire profit margin rides on the fact that their AP is on Net-90 and their AR is Net-60 (or similar). For stuff with long lead times, payment in fact does often happen before delivery. How is that illegal?