I've noticed that a number of listings -- for example, the Legion of Nothing page -- have a section that updates any time the story is updated. This "Latest Updates" section appears to be attached to the rss feed associated with the story, though I'm not 100% sure of that.
When I submitted Pay Me, Bug! I included an rss feed, but my listing doesn't have a "Latest Updates" section. The feed is valid, but because I'm running on an SSL-enabled site it uses https instead of http. Could that be affecting whether or not the Latest Updates section is triggered? Or is there something else that needs to be set up before it works?