Looks like we have first AI/human farm attack. According to this telegram message 700 nodes are connected to single qtrade deposit address.

"this qtrade deposit adress:
https://scan.idena.io/address/0x442FB9F44922e6Ff9e3281753953546942EfFB7B
is connected to 15 nodes:
https://scan.idena.io/address/0xdeC6C15F2E4B06880A361ecBeaf4A47Cc132076b
https://scan.idena.io/address/0x63062137B01B13CfB53F57e1d271Cb6fc406F54b
https://scan.idena.io/address/0x240B38f8809E29FE3257A2bEf95C588b1d24d6c3
https://scan.idena.io/address/0x90962375f5Ce9346596Ea441BC1b9619BCf6277A
https://scan.idena.io/address/0x0ecc4Da09df752Bd0Be6a937E31aC161F15DdE29
https://scan.idena.io/address/0xEA9F20BCb0102f280C13BC4C01893Cc5e3fceb4A
https://scan.idena.io/address/0x104c1C8F89e414baD8dCF27b8Bb16eC31b28dFB3
https://scan.idena.io/address/0x37590b1dA8Ef2Aa12AD760087e70F20E7316A042
https://scan.idena.io/address/0x85a93785cFD0b6d6dB57e39f25af445AD89851a9
https://scan.idena.io/address/0x4C08CF3Fd4CA78EFaE881cA83c4dA0895cf876eE
https://scan.idena.io/address/0x53C34539ad373412129198F51dCBD1cEa8814876
https://scan.idena.io/address/0x1E0D0E1b9e97d2A3689381CE67B3A8ccA33312A1
https://scan.idena.io/address/0x28f4B70Bd1291AECf8e1f695674Ad41c525a3d2a
These 15 nodes collect founds from ~50 small (1-5 epoch old) nodes each. This farm of at least 700 nodes belong to 1 person and minned 140k iDNA during 1.5 epoch. 10-15% of all indena nodes belong to 1 person and it was all achieved during 4-5 validations. He will have more than half nodes in next few epochs."
https://t.me/idena_trading/30534

No official response yet.