I'm not sure I understand what the motivation is for doing this with electronics? To try them out? Who would want a camera that you can only use for like a week or so?
I don't do it myself because I consider it against my ethical code to buy something with the intent of returning it in order to effectively get a free rental, but I totally consider the appeal. Hell, I'd love to have a fancy telescope to play around with for free for a week.
Others order 5 cameras and lenses, select one, and send 4 back to Amazon.
I have been tempted to do this. It makes deciding on a purchase very easy. Now that I've read this I will not do it. Maybe this is Amazon PR to discourage people like me.