Your linked post seems to be more about an agent interacting with a dumb-matter environment, and about the relationship between free will and determinism. My post is specifically about what happens when two agents interact with each other. The point I was trying to make is that the sense of indignation that accompanies the intuition of free will is tied to the desire to protect one's utility function from alteration in the presence of a hostile intelligence.

Your comment bridges the two nicely.