The brothers created 16 Ethereum validators and targeted three specific traders who operated MEV bots, the indictment said.
To activate 1 validator you need 32 ETH.
So for the 16 validators they got, it would be 512 ETH. Prices in December 2022 for eth were around 1200$. So they "invested" in this fraud over 600,000$.
Today's eth price is around 3000$ so they'd be having over 1.5 mil, if they weren't that greedy