Not necessarily Spooky specific, but consider adding a "DMCA Friendly" sound option that allows streamers/video makers to hear callouts etc, but not play sounds that will get them shut down.
Allow people to easily add/change modes and rules to your games. Right now, every other pin maker is a closed system. I think there's an opportunity to be something more open.
I doubt either of these things generate much, if any, new revenue, but hey.