I don't use revenge myself, but these are a few reasons as to why i would have thought others use this feature;
- 0 gold usage as no need to Next
- Can essentially plan the attack before going in ( Much more time than when searching normally, 30 seconds )
- Can check cc to see if there are troops
- Revenge is sweet if they did a number on you
I am sure there are plenty more, these are just a couple from the top of my head.




