Long before they even called it sacrifice this was brought up. The following is copied from an old post stickied in the guides section. Posted by Lamia on 7-3-16. It's not a new concept for them.


"Quote Originally Posted by GaiusVagor

I have several Wickerdog Kings, but would only ever be able to use two of them at a time. Are the extras good for anything other than gold?"


Lamia's response
"Currently you can only sell extra characters for gold, however in a future update we will be making duplicate characters much more worthwhile. So perhaps for your more valuable extras (4 and 5 stars, say) you might want to see if you can maintain enough space to keep them around."