It's possible that we have so many things to do, that our population is spread thinly over all of it. Maybe instead of coming up with a brand new theme every time, we can rotate between already existing contests.
  Instead of making brand new Official Contests which could "steal" peoples' time from other contests, we could Officially Feature existing contests for a short period of time. It would be a bigger deal to win the Concerti contest on months when it is Officially Featured, than on other months. Maybe winning an Officially Featured contest will get you a credit in your Awards box.