Interesting that they have a pretty url already generated for the page and then redirect to something that's completely unreadable. It seems like you'd want to have a single, readable url to have people sharing with others, if they copy and paste the url from their browser.
Why do that when they can create a unique URL And data mine who you share the link with or where you post it? People call it "dark social" where there are no referrers such as IM, Text, or chat services like Slack, Hipchat, etc.
They do exactly this for their products, if you look in the URL you'll see /dp/something if you do Amazon.TLD/dp/something it takes you to the product. Someone mentioned dark social and that's exactly what it's for according to one of the Edinburgh Amazon devs. :-)
