Yup. I think we did it every four months one year with the shields. Couple iterations over the years.Every four months/three times a year would be easy to maintain. It doesn't seem like it will be a very big deal if they're conducted any more frequently than that.
There should be a public voting thread. That's the fun of it because you can see the reason (if people choose to post one) for each person winning. Funny stories come out.