ssyffix
Why doesn't MC ally himself with the Sea Snake and conquer some Islands from the Summer Islands and create colonies? He could trade then with cacao, coffee, potatos, sugar, tobacco, even tea. It should be possible because the Summer Islands are like south America. The only downside would be that he must join the war in the stepstones and destroy that Crab guy. Slavery worked in our history with cristianity. why shouldn't it work in Planetos? You could even you use the seven and call them heathens and change the religion of those summer islanders. And call for a great crusade or something. he could make a big sum of money.