So basically I am quite a new player for VP and this is my first time trying Domination victory. I found out that it is pretty easy to vassalage other civ once I conquered their capitals. As far as what I have known, after vassalage other civ, I can get part of their production every turn. However, I would like to ask what are the Pros and Cons for vassalage? Are there any situation that I better not vassalage but just sign a peace treaty or eliminate the entire civ instead?