Amazon is in the hits business. The company never reveals specific sales numbers for its Kindle and Kindle Fire products except in words like best-selling, but Amazon sells tablets and ebook readers in the millions. At $99, Amazon’s new set-top box will compete with devices like Apple TV, Roku, and Google’s Chromecast to be the gadget consumers use while cuddled up on the couch in front of their big flatscreen. On one hand it’s an obvious move: Amazon has thrust huge resources behind its streaming video service, which is of course the primary method of consumption on the Fire TV, and the company has always said that it makes money not when you buy a device, but when you use it (to buy things from Amazon).