These guys did nothing wrong.i was pretty happy when this happened. It's funny seeing the guys running MEV bots all butthurt when someone out smarts them. But it's scary that the DOJ is siding with them.
From my understanding as well, they didn't exploit a bug in Ethereum, but in the MEV bots' parsers. Hopefully all those Google searches for a Saul Goodman-esque Cryptocurrency lawyer will pay off.