As you guys point out - Amazon gets a much better *marketing* from claiming they want drones. Doesn't matter if they can do it or not (obviously as of today this is technologically impossible to have this work in a reliable fashion, and probably not in 5 years either).
And in that, they're right, ie, they're getting fame, customers, money, even thus it's a cheap marketing lie. So since money is all that matters, they're "right".
However, eBay's right too, drones are currently a fantasy, and focusing on what you can do today is what Amazon does too. What a company does and communicate is often very different. eBay's CEO being honest is what i'd like from every company, but isn't what is going to work for them unfortunately.