RE:RE:Nexoptic at Shot Show They are not doing presales. You wouldn't want to do presales on a product that has no final specs, has no nailed down price, and has no official launch date. They are simply showing of the prototype to 1. |raise awareness of the company and the product and 2. To gather important feedback from targeted groups of people on what they like/don't like about the product and what kind of features and ways they would actually use this.
They will then take all of this information to finalize the device so that it is a device that is relevant useful for the target market they will be selling to. They then will also gather contact information to help push pre-sales orders with all of the new people who signed up for future info from them.