If the problem is over rewarding or it becoming a novelty then just do it once a month. Something scheduled also helps out a lot for those of us that have busy schedules - there were a lot of people psyched up for Daev/Ray's scavenge hunt because it was announced in advance. If it's because it's a lot of work, then even something fun like the Twist trivia or an Arena competition would spice things up.

Maybe the Inn just needs to do more stuff...

Thanks for the thoughtful reply - that's really all I wanted more than this hostility.