We've seen this ploy before (for instance, here).
This is a variation on the Appeal to Authority. You are meant to be swayed by this pig merely because of his alleged standing or status. Take heed of his eyeglasses—the totemic indicators of his sterling mind. Gaze into those pools of reason, wellsprings of the dispassionate love of fact. Here is a priest of rationality. If a brainy pig, of all things, has concluded that eating dead pigs is good idea, well, maybe we should pay attention.
Indeed, Harold has achieved a high enough level of intellectual development that he is able to levitate above the flames. And yet he is still lunkheaded enough to shill for a barbecue place, beckoning tirelessly to motorists in Atlanta, Georgia, for these past 60 years.
Harold, climb down from there and use that brain of yours for something worthwhile! Or at least something in your own (or your customers') self-interest. This is accomplishing nothing.
Hey! Wait a second! If you're so smart, how come you're smoking a cigar?
(Source of photo.)