I would like to start by saying that I am always quick to give Alphabay the benefit of the doubt. I think they do a great job considering the massive amount of transactions that go through their site every day.
However, I just withdrew about 1200 dollars using the "Send a single transaction" option. When the coins showed up it was NOT short by the 0.001 BTC they have listed on the balance page. It was 0.007 BTC short. They took an extra six dollars!
Now, is it a big deal? No, not really. But this needs to be acknowledged and explained, I have seen other people make similar claims and now I know first hand that they were telling the truth.
So, Alphabay, what's up? If it's just fees for the tumbler that's fine, but some more transparency is needed on this.
They do all sorts of that shit, kinda like how they undervalue BTC prices relative to the market or absorbing the remaining 0.0000xxxx that wasn't included in your withdrawal... Cost of doing business I suppose. They're moving towards the Comcast/Verizon model of simulatenously providing a highly demanded service (and doing it well) while never wasting an opportunity to actively fuck their customers.