I would assume miners, could be wrong.

Did you check this? "Someone seems to have mistakenly paid $2.5 million in Ethereum transaction fees to send just $133 in ETH. Though, the real reason could be more nefarious."

The transaction fee goes to the miners to help pay for electricity and equipment, and their time. Here's a good read for you.

ohh Thanks for this :D

@nathansenn read an article that said it was a mining pool that mined it, and that they were interested in returning the money to the person that made the mistake. There should be checkpoints in place on ETH that prevents this type of thing.. something like max_mining_payout 👍