normally i would just add this into my feedback topic, but it deserves an own thread i think.
my guess is the idea for extending revenge links to (7 and then) 3 days was to allow casual gamers to hit back.
on active servers right now this looks like: share a link with literally every kingdom that can attack the target, break the wall, use the full 3 days to hit every 2-3h again to keep the player below 5%.
i think after a players wall gets zeroed, all revenge links on him should become invalid, since the revenge officially succeeded.
everything else is just a motivation to quit the game.