Ambient Ads Everywhere, No One Sees Them

We do enjoy all the inventive ambient campaigns that spring up in Europe all the time but one thing concerns us. Does anyone ever see these things? Every time we are sent a photo of the latest creation or we see it on another site, 100 percent of the time there's never more than one or two people in the vicinity of the thing. Perhaps all the photos are early morning/late day staged photos. Perhaps they're just wishful thinking with help from Photoshop. Either way, one would think the agencies behind these things would at least go to the trouble of creating the illusion or capturing the actual reality that more than one person sees these things. Someone please enlighten us.

UPDATE: Anthony from Saatchi & Saaatchi, the agency that created the campaign, gives us out answer, writing, "I work at Saatchi & Saatchi Simko in Switzerland and I worked on the project... so here is my answer: Yes this was really produced and placed in several places in Geneva. Yes people did see those and the impact and feedback from the public is great . The reason why there is not a lot of persons on the pictures is that we shot those early morning right after when it was placed."