...but it's certainly not something I'd want as a default that a GM /has/ to accept.
That is not the way added features in our Text Role-playing Game Creator works. Just like the current Character Gems the Player must find out first if the GM accepts it, if he / she does then the result must also be accepted and honored. Therefore if you were a GM of a Role-playing Game here you would first have to say if you are willing to accept the Deity's Resurrection, if you are then you must also accept the random favor.
Such added features do somethings beyond just the Role-playing Game at hand:
1. They allow Players to 'work' for or support the site as these features aren't easy to come by.
2. They add a twist to Role-playing Games because they are custom coded you won't find it anywhere else
3. They force Role-playing Games to not be routine / stagnant as the feature acts as an anomaly that has to be worked into a current story.
Now, in the case of this feature the fact that the return is a favor now leaves an extra adventure open as it needs to be fulfilled with the consequences of such being determined by the GM.