They won't drop the amount needed, last time the top few servers suddenly soared ahead of the target and ended up doing about 10x better than most the other servers, it will probably be the same this time. I'm not sure why they bothered with this kind of event given how badly received the eotw event was, maybe they just like giving more free stuff to the German home servers?
It would be nice if the scoreboard had scores rather than percentages, at least you would know what your contribution is worth then, you can throw 1Mil balloons in donations and it might not even provide 0.01% at the moment