We might model how good a post overall is by drawing a bar chart, one bar for each reader, reflecting how good they think the post is (how much utility they get out of it). Then the goodness of the post is the area under the curve. readers utility We might also model that a reader upvotes a post if its subjective goodness crosses some threshold, so, the number of upvotes a post gets is just the number of bars passing the threshold: upvote threshold number of upvotes readers utility The post depicted above would receive the same number of...