Everything I order from Amazon either comes via their own branded delivery network or intelcomexpress. Never received a single item through Canada Post.
Not sure what you mean by that...... do you get vans/trucks, in Amazon colours, show up with "Amazon" plastered on the side? AFAIK, Intelcom Courier(or courrier, as they spell it on their site) IS their main "delivery network"..... or at least they are in our neighbourhood. Having said that, we have had the occasional Amazon item(s) arrive via Canada Post.
That's really weird that an empty envelope would show up like that. Like others have said, let Amazon know and they will replace/refund it ASAP. That's a good thing about them.
Yup, my wife had ordered some stuff for her crafting projects, and their tracking showed it as being in their Surrey depot(Intelcom...... the last stop before being delivered) for several days, and eventually said something about "may be lost", so I did live chat with them, and they replaced the order RIGHT AWAY, and we got it a few days later.