There is such a Coda.fm tracker and it is distinguished from many others by its original design and innovative technologies. One of these features is the presence on the download page of the torrent file - links to the online store Amazon. Very competent decision to give the user the opportunity after listening to buy the album he liked, but Amazon is against these links.
Perhaps, the leadership of Amazon decided to disown such technology as bittorrent, considering it to be something illegal. In any case, a very stupid decision, to deprive users of the choice and deprive themselves of the same legal earnings. The code, meanwhile, refused to clean up the links, the pirates buy music and hundreds of albums sold through Coda.fm to prove it.