In a surprising turn, Bitmixer, the largest Bitcoin mixing service said in a Bitcointalk post:
"Hi all!
Despite the huge profit we earn, we are closing our activity. Let me explain why.
I'm bitcoin enthusiast since 2011. When we started this service I was convinced that any Bitcoin user has a natural right to privacy. I was totally wrong. Now I grasped that Bitcoin is transparent non-anonymous system by design. Blockchain is a great open book. I believe that Bitcoin will have a great future without dark market transactions. You may use Dash or Zerocoin if you want to buy some weed. Not Bitcoin.
I hope our decision will help to make Bitcoin ecosystem more clean and transparent. I hope our competitors will hear our message and will close their services too. Very soon this kind of activity will be considered as illegal in most of countries.
Cheers,
Bitmixer.IO "
At a later post further commented:
"It was a really very hard decision. Especially it was hard to drop this business because of incredible high income. But we never had any government or legal pressure, it is only my own opinion. I really believe in clean transparent Bitcoin. I really happy that Bitcoin legalized as payment system and currency in many countries, I actually didn't believe in this in 2011"
https://bitmixer.io/