Everybody has lives and problems, and if the reward can't be given because of, say, hardware problems, then you just have to wait. If it turns out that the reward can't be given at all, then a substitute reward could be given, if anyone would care to donate something (and if it's a decent quest, and advertised enough, then I'm sure somebody wouldn't mind).
So basically; I really don't see the point in having one person deliver all the rewards, and if this did happen, I would prefer it be in the hands of either Mur, or an automated system >>