The internet has been vocal in its negativity about delivery drones since the idea was first announced around two years ago – this week is no different as Amazon has taken another step towards “realizing its vision” by revealing some concept models of its PrimeAir drones – aptly placed on Cyber Monday. The drone starring in Amazon’s first advertisement sports multiple propulsion systems – a pair of propellers on each side to lift the UAV up to “almost 400 feet”, and a rear-mounted propeller to drive it forwards. Amazon says the drone can fly for 15 miles, and claims it will “deliver packages to customers around the world in 30 minutes or less,” – but that’s about as detailed as…