"And moreover, this is only the drop rate of a Second Tier treasure box. If it were Third Tier, it wouldn't be impossible to have four hundred thousand zombies, and that would indeed be a veritable sea of corpses.
Even so, among the one hundred ninety-five countries around the world, it's a minority that has a population over a hundred million. In fact, one-third, or sixty-six countries, don't even have a population of four hundred thousand.
Moreover, this is just talking about sovereign states. If you add in various independent regions, there would be even more, easily reaching seventy or eighty, rounding up to a hundred is no problem at all.
