I understand where you're coming from, but my point wasn't "I don't want an iPad", but rather that I feel like these prizes specifically cheapen the feel of the jam, especially considering how big github is. I don't know, I guess I've never participated in a game jam with a prize. But seeing as Ludum Dare pulled >1000 participators last jam, it doesn't seem like game developers need too much of a monetary incentive to jam.
In any case, I'm happy that this is happening; prize or no prize :)