Amazon’s increasing importance selling digital content as well as physical products is undeniable, but the company’s tight-lipped nature when it comes to providing figures makes it hard to gauge how its business is growing. Amazon announced its latest quarterly financials yesterday, with revenues up 34% year-on-year to $13.2bn, and net income down 35% to $130m. How’s the company’s MP3 music store and cloud locker doing? No figures. How about its Kindle Fire tablet? No figures (apart from the claim that it’s “the #1 bestselling, most gifted, and most wished for product across the millions of items available on Amazon.com since launch”. The company did say that in Q1 this year, “nine out of 10 of the top sellers on Amazon.com were digital products” – something that includes the Kindle itself, as well as e-books, music, films and apps. In separate news, comScore has estimated that Kindle Fire accounted for 54.4% of in-use Android tablets in the US in February.