It can be easy to forget that CDs still represent a significant chunk of the music industry's revenue in the streaming era, but pirates certainly haven't forgotten. The Wall Street Journal has learned that counterfeit CDs are a serious problem at Amazon and other online stores. Bootleggers (frequently from China) produce discs that are increasingly similar to the real deal and sell them for slightly less than legitimate copies, making them look like bargains instead of obvious frauds. And they aren't always coming from obscure suppliers, either. In an RIAA investigation, Amazon fulfilled 18 out of 44 CD orders identified as counterfeit.