Energetic advertising

I don't get this. You see guys like this on street corners everywhere, holding big signs and dancing like fools to get attention.  This particular fellow was on the corner of Powers and North Carefree or thereabouts, and the sign he's holding is advertising a gold and silver broker (I think).  I'm not sure that this is the best way to spend your advertising budget, not to mention it was about a thousand degrees outside when I took this picture through the windshield of my comfortably air-conditioned car, so that guy must have been roasting hot (although I have to admit that he also looked like he was having fun -- he must have had some good dance music on is iPod).  I don't know, maybe it works?  When you see a dude dancing on a corner and holding a big sign, does it compel you to go to his employer's place of business and buy something?