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?
Depends: for how long? 1 finger = 10% of humanity has all of their basic survival needs met forever? Done and done, take all 10. Seems like an extremely tiny price to pay to alleviate a colossal amount of suffering in the world forever, and without all those people being distracted by meeting their basic needs odds are technology is going to advance even more rapidly, along with the quality of things like medical prosthetics and neural interfaces and shit. So, yes please bring on the cyberpunk without the dystopia.