There's not really any news here, other than the fact that managing such a huge _and extremely effective_ commercial website is difficult even for one of the most well-resourced tech companies in the world.
If the purpose of an website-that-sells-things is to have carefully tuned UX for every product page, Amazon.com has some small (although hardly 'horrible') UX problems. If the purpose is to sell stuff, the article makes it very clear that for an arbitrarily specific product (bassoon straps), you're extremely likely to be able to buy one quickly and easily from Amazon.
What if BuzzFeedNews.com is actually... trolling its audience?