That will never happen, at least not how you’re describing it. Suppose, for example, that Bambu doesn’t like any of the user submitted designs? Would Bambu be obligated to pick one and produce it anyway so as to fulfill the terms of your imagined contest? Put yourself in their shoes. And when Bambu doesn’t make even one of the submissions, the net result will be a bunch of pissed off contestants creating a lot of negative buzz. Where’s the upside in that?