I'm pretty offended (not easy to do) by the comment that this is some kind of porn book. I'm sure Monte and anyone else who worked on it is too.
I'm interested in this book because I've tried to write rules over the years on how to give people power from sacrificing things. Those who say these rules aren't needed: how did you feel about the Demonology rules? How did you feel about the rules in the Green Ronin book (kind remember if it was Abyss or Hell) where a (N)PC could "bond" with an evil entity? How did you feel about Defilers, Blood Mages, or Blight Magic? I think that rules on the power that evil gets from doing evil helps explain why they do it. Understanding your enemy is always a powerful tool. As for those who say you can just imagine this, and that this is a tool for those without imagination, you could say that about Occult Lore, Alchemists and Herbalists, Spells and Magic....Do you feel the same about those books?
BTW, if there are rules for sacrifice, couldn't you flip those and give power for sving things? How about for sacrificing gold? What about converting a Demon to Good? I'd think it would be easier to extrapolate how to give good power, if I had rules on how evil got more power. That's part of my plan, anyway.