The 10% stacks additively, each time you do the deal, this status is applied to a different 10%. If you sacrifice 10 fingers, the entire world is guaranteed basic human needs (food, water, shelter, clothing, healthcate, etc…)
Nobody knows you saved them. Would you do it?
If everyone knows about the fact that you can do this deal, would that change your mind?
Its only “basic needs”. Paraplegics are still human. you dont habe your fingers anymore, but you’ve still got two extra arms, two extra legs, a spare lung and kidney, and a bunch of other stuff that you don’t technically “need” as a human.