Marinade is a sandwich-driving pool. Their auction model is not designed for regular validators to win stake, because they have no way to bid for it. Anyone who pays bids to win Marinade stake is doing it because they make extra income from it. And the bids are very high. No arbitrage or other ethical strategy can yield more than the cost of those bids. So 99% of validators who win Marinade stake are running toxic sandwich strategies. If you stake with Marinade - you are supporting sandwich attacks on the Solana network.
Marinade is broken, their previous model, which supported decentralization in the network, was much healthier for the ecosystem and the overall growth of the network.
Now, it’s just a senseless race for additional profit.