"TM7ebojWqc6ZHaDHCxF96aXHekXu1483Z3",
had 50 GH/s during the 20 blocks from the blocks 16620 to 16639. Each block gave 40 EQT.
After that the superegoist left the chain with difficulty 1976.
These 20 blocks took 8 minutes but should with a block time of 5 minutes have taken 100 minutes.
https://chainz.cryptoid.info/eqt/
The adress has received 51669 EQT since 26th of may 2017. Calculating with a value of 0.00005000 BTC/EQT that is 2.58 BTC.
https://chainz.cryptoid.info/eqt/address.dws?TM7ebojWqc6ZHaDHCxF96aXHekXu1483Z3.htm
The pool was:
http://miningpool.thruhere.net/workers
When the mining difficulty goes down a person or multipool can throw an overload of hashpower on the mining network to try to mine many blocks in a short amount of time. The result is a high difficulty for anyone trying to continue mining after that.