We have deploying a number of hashtag-driven Twitter Q+A campaigns in the past for THQ game franchises UFC and WWF. The Q+A application asks fans to answer or respond to a question each day and enter for a chance to win daily or weekly prizes. The concept is very similar to that of a scavenger hunt, and in fact, this same application can be used for that purpose. It is also the same engine behind The Wanted Jukebox application.
We deployed a similar application for Epic Records (Sony) artist Future. It asked fans to tweet what they were doing at the #SameDamnTime to promote his single of the same name.
Application features included: