I don't think it's going to be any big deal for River to make money, although on this planet there are a number of scary possibilities. I really am having fun playing with these three. Jayne looks the scariest, Mal is the captain with the power of that behind him, and River... well, she's in a category all her own. And I am SO glad you see what Jayne's problem is. Over and over, he's worrying not about the slavery but the form of it. He won't walk on her leash unless she kills have the town so they know that he's not a wimp. He wishes she looked scary so it justified his obedience. He's struggling. And Mal is not actually helping any.