From a legal perspective, they really can't go out and get pics off the net and use them in their ad. Those images were submitted to them for use in this ad campaign. They put out a solicitation for images to the ZCCA clubs or some group of them (I'm in ZCOT, I submitted a photo). The people who's photos do get used get paid for them.... well paid from what I understand.
I agree, I don't know WTF that ad represents... it's definitely not the complete timeline & heritage of the Z.
Later
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the universe." -Albert Einstein
When was the last time you *really* did something with your Z to call yourself a Z enthusiast?