Maybe make a pool to define which topic will people write (100 characters max) in a comment the next day. The topics that are the most upvoted the day before will be the ones valid for the next day. People who comment on the topic the next day will be rewarded by upvotes from POB Talkers in itself, no extravagant system or process needed, just creativity! ;)

And people, stake your POBs! 1+1 eventually adds up to 100 then suddenly your vote isn't so dismissible anymore, that's how we make POB grow!