I'd assume that cjdrum wouldn't have allowed one-shot vengeful kills, since they're inherently (almost) one-shot. (Sure, it could work twice if you got resurrected, but seriously now.) So they're pretty expensive. But they're much more useful for town than scum, because there were five town and two scum, so a one-for-one trade is a big win for town.
I really don't see how scum could have won if town had organized to take some form of Vengeful Kill for everyone, redundant one-shot manipulative disablers for D1, and a few public daycops. No way to kill lots of town without dying, no way to stop the investigations, and no way to hold off the lynch. I'd probably have just had us both take unmodified Horcruxes and hoped we ended up protecting each other.