scott,
The Kellogg's company invites people to try the Kellogg's diet but doesn't give any details on how to do it? What kind of diet is that? How can they tell people they will lose weight if they have no idea what is being eaten for lunch, dinner and snacks? It seems they have come up with a very clever gimmick to sell more cereal.
They should at least state on the box what the serving size is. Is it one cup? If it tastes good, who will eat just one cup?

The next thing you know, a potato chip company will come up with, "the potato chip diet". That will be a diet where you eat just one potato chip.
If you like Kellogg's cereal so much, go ahead and eat it but don't call it a "diet" if there is no diet plan. Is shredded wheat a diet? Is oatmeal a diet? Is wheat germ a diet?
See if they provide a toll free number on their cereal box. If they do, call them and ask what the diet consists of for weight loss. I'd like to know and I'm sure others would too.