This isn't the first time Amazon has allowed Prime customers to tack on other video services to the subscription. It also lets users add Showtime, Comedy Central and others for folks who are willing to pay extra for those. If you'll recall, Hulu is doing something similar by offering Showtime as an add-on to the regular streaming options. Putting all of those things in one spot certainly seems convenient, but Amazon will need to make that one-stop shop easier to use if it really wants to compete with the likes of Netflix and Hulu. But hey, at least there's Saved by the Bell.