The best part is that no fees are charged, which I still do not get. Don't you have to pay transaction fees at the very least, but yet no fees are charged? I know people can choose to donate, but how much I am not sure how much.
I assume this must be a part of early days promotional offer. I read chipmixer accepting donations instead of mandatory fees for providing mixing services. It means we can pay the amount what ever we may prefer as fees. A generous user may finish of his mixing services along with splitting once chip with 0.001 value for donating to chipmixer at a same time a bitcoin whale may prefer donating 0.1 bitcoins too.