Bitmixer was a massive outfit... If you read the closing down thread, Bitmixer claims their service was valued at 5-6 million... 
BitMixer also says it mixed more than a million Bitcoins in 2016. At a minimum of 0.5% fee, that gives more than 5000 Bitcoin profit (minus costs of course). I didn't know mixing is such a big business. I could sell the business for our competitors for $5-6M
First, due to unexpected amount of traffic, all prepared chips were withdrawn (there were not enough for this demand)
I've been wondering before, but I never asked: how much does ChipMixer have to work with? BitMixer had 2000+ Bitcoin at it's peak, with some very high volume customers. If ChipMixer has - say - 100 Bitcoins, and someone wants to mix 200, it's nice to know up front that won't be possible.Also, if yesterday's ChipMixer users will get "newer" Bitcoins back, how do you guarantee they don't get their own Bitcoins back? Especially if you don't keep logs of who deposited which coins.