Under negative points:

> Declining reusability due to the stress on the structure: the cardboard will not be strong enough to make many flights.

Which is no doubt absolutely true—but on the other hand, the cardboard isn't the valuable part of the drone. You could have a stockpile of the cardboard (which they claim is a little larger than a pizza box), and swap out the motor and electronics if a unit survives long enough that the cardboard starts to fail.