A DeFi trader tricked Ethermine's sandwich bot into purchasing "Salmonella" and "Listeria" tokens for some 130 ETH.
Maximal Extractable Value (MEV) has netted traders and miners some $1.7 million in profit in the last 24 hours alone.
Mining pool Ethermine said it would never freeze transaction fees again.
Over the past two days, an unknown wallet holder has paid some $5.2 million in transaction fees for two ether transactions.