First, I want to say I'm really enjoying the game so far, even if I'm not doing well in terms of making progress through the levels (I'm really good at getting tied up though... ;p)
Having read through other posts, I know that the captured enemies side of the game is still in development, but you can currently switch those you've captured between prisoner and promoting to servant, but I haven't been able to work out what that does, if anything. Does promotion have any effects currently or is that a future feature?