The Sparkpool mining pool received a payment of more than 2000 ETH for the extraction of block # 7 238 290. This is 600 times higher than the standard remuneration of the network at 3 ETH.
So, the pool included 210 transactions in block and received 2103,1485 ETH. This incident is instantly overgrown with different versions.
Jimmy Chong, co-founder of the decentralized IOST application, suggested that one or more users might accidentally set a transaction fee at an extremely high level.
Other explorers do not exclude that someone could anonymously support the community of miners. Skeptics say that attackers could launder money in this way.