Is it? The main writing challenges were the Valentine's, drabble, fight scenes and epistolary fic. Only the epistolary would you need context to judge, maybe the drabble. But it's so short I question needing context. Whereas with the haiku, limerick, and sequel, there really isn't much you can draw from context. It is what it is. I doubt there are too many challenges in which you earnestly need to have played the game to vote.

That being said, it could work perfectly if major writing challenges, like the epistolary or drabble, that need context to understand and vote, could have the restriction. A half-on, half-off type of thing.