With Dash powered vending machines it would be very easy for a large vending machine operator with multiple vending machines spanning a large area (like for example in tokyo) to keep track of sales in real time. This would allow for easy planning of restocking, and maybe even do event like give away a free extra drink to the 10,000th customer. Of course, it would also safe money to operate the machines because they only need to be restocked, and no longer do you need to retrieve cash from them. In areas where there is no free wifi, your vending machine could be a wifi hotspot to draw in extra potential customers. If some smart programmers would make some software+website an sell custom dahs vending machines that automatically track the sales for smart restocking and monitoring for the vending machine operator, that could be a nice business model that also supports Dash.