They should know they won't get far with us if they go back on their shitty promises. [He says it with the intent to be logical, but there's weariness in the background - the Malnosso don't exactly play fair, even by pirate standards.

But it's the only thing that makes sense to him. Otherwise, they'd be nothing stopping the shits from manhandling them into doing their dirty work, like always]

Of course, that's assuming they're not idiots.