Like said, the image associated with those Mario Kart images is simply too big, hence why we request users to remove them, or we simply edit them out ourselves as staff. It's annoying and spammy to look at these huge images when it should be about the messages people post. We're not too nazi about image links to blogs and all, but in this case it's the size that's simply a problem.
Anyway, enough about the signature, let's keep things on topic. I like the Mario idea contest, but if you want people to take it seriously you should consider at least making it look a bit more structured and thought out. If it's just for fun then don't mention a prize that you don't know of yet. It's those little things that put people off. It's be nice knowing the why and how of the contest and some background information, rather than just seeing you advertise your own contest.
If anyone has any comments like these, please use the "report post" button so that any of the appointed staff members can handle these situations. This way the off-topicness can be reduced to a minimum. Especially posts like "Indeed" (#3) are completely useless, so don't do it.
Thanks