Amazon filed a patent to de-anonymize Bitcoin transactions and sell the data to law enforcement
Amazon wants to get his nose into the coins of the users, so you can already see how things will work if Amazon ever accepts Bitcoin, they will attempt to track everything and sell your information, just like Facebook.
This is really very interesting. And this also it putting a tombstone on the dreams of mass adoption preserving anonimity. You won't be able to have both.
Whoever had such dreams was as delusional as those thinking that using Coinbase wouldn't end up in IRScentral. I mean it's really ridiculous how deluded people are. Amazon is working with NSA for a while, their Alexa thing is an spying robot straight from Orwell.
Anonymity will never be mainstream. Governments are anti-anonymity, they want to know where your money is and what are you doing, that's what government's do. Who is surprised about corporations complying with that?
What would Amazon possibly gain from doing otherwise? how would Amazon possibly let people buy anonymously and get away with it? These things don't work like that, as long as governments exist.