the only thing I would add to this discussion is this. If you are using a relatively new sponsor, or one that provideds a limited amount of free content, there is the possibility that there may be too many others ahead of you that have already used that very same content.
So if the sponsor only has 5 sets available, and a dozen people have already submitted sites with the same content that you are going to use, there is a chance that your site might be denied. So, my suggestion is this, if you are going to use sponsor's content, try to grab it when it first hits the streets so you can be one of those whose site is accepted, rather than be the guy that decided to do it late in the game.
Happy New Year
