At the completion of a saga, I think all the characters who made it to the end, should recieve a prize for finishing it. Such as the main person (whoever's saga it is) should recieve a special weapon, or sub-sig. Whereas everyone else who survived to the end, should recieve a Zeni reward.
This give players a chance, and reason, to stay until the end of the saga, and show off their real creativity. I believe that this will help in the participation of wiki activity, and add a sort of "zing" to other people's sagas.