Other options
  • $tasks: Small task economy for sat bounties. Sometimes even Stacker News could post tasks to e.g. rate whether something is a spam or not :)
My pick
  • $v4v (I'd call those probably $pods): I would be interested in what podcaster app creators think about it. This would help them by creating a strong community and stacker news could link to the apps... The main reason I'm arguing for $pods is that there is a large community of podcasters (thousands have node already) and much larger community of listeners (millions per episode on the most popular podcasts) and having $pods would add value (and stream of sats) for all of them.
I like the $mail idea, since it helps community. And I'm always annoyed by trying to read the mailchimp output.