A bit of background around the company: They received the largest fine (until that point in history) for trying to use this to front run the market from their dark pool.
https://www.reuters.com/article/us-securities-regulation-itg...
https://www.reuters.com/article/us-securities-regulation-itg...
Their MM operation was making lots of money according to someone I talked to. Just not enough to offset them setting it on fire.
Alameda did many illegal things, including lying to investors about their returns to get funding. And pump and dumping a huge lot of shitcoins which SBF created or funded.
So I don't doubt they'd also frontrun their customers.