Wow. This is something. I'm confused a bit though. This part:

Of all transactions executed on the Ethereum blockchain during the analysed period, addresses with the incoming amounts of ~500, ~1000, ~2000, ~3000, ~5000 and ~10,000 ETH constitute 68.5% (260,1041,693.6 from 3,791,195,132.0 ETH) in money terms and 10.7% (6,216,314 from 58,035,623) in terms of numbers. The further analysis shows that these addresses are linked with each other and might be controlled by a single entity.

Are you saying that 68.5% of all ETH (value) is traded by this single "Mixer" entity? And that although the value of these trades is 68.5% of the total ETH value, the trades make up only 10.7% of all trading volume?

Thanks for the clarification!