Competition? Just sharing order-ID is enough for competing here? Sounds more like lottery. When this is just based on luck factor then this topic more suitable under Games and rounds sub-board.

Also I got a suggestion:
Instead of simply asking sharing order-ID alone, asking participants about their experience with smartmixer will be more appropriate which may make this topic to be qualifying to this section as well. I mean you may choose best reviews to award and the basic criteria to participate here could be order-ID.