The programming Gods do seem to be against ya 
Luckily for Riombara. But perhaps they have a story of failed looting of their own? 
They traditionally are more looting-shy than we are, though they missed out on a bit as well. However, they only got to a handful of Enweil regions, looting them wouldn't have dented Enweil's economy. Us looting all of their isles *would* have dented their fragile food balance, however.
