That's not true at all. Look at the WSJ versus your local paper. In the WSJ they advertise Bentleys. In your local paper they advertise the local sporting goods store.
Ads don't need to be relevant to content. That's the ultimate mistake with adwords. Ads need to be relevant to readers. WSJ readers are, with high probability, richer than the readers of other papers. So they want bentleys, no matter what they are reading about.
Good heavens. Maybe this is why they don't seem to care that their subscriber-only articles are invisible to the rest of the world. I thought they were just backward, but maybe the WSJ is in effect a luxury product.
Come to think of it, though, those numbers could as easily imply that their average reader is very old. So maybe they are backward.
I very much doubt a census was taken. The page says the source is from a "2007 WSJ Subscriber Study." It is very doubtful Bill Gates was part of this study. In all likelihood, they polled a relatively small random sample and the median was pretty close to the average.
An NPR story I heard the other day brought up a related factor in their stubbornness to go free: unlike most other newspaper subscriptions, most WSJ subscriptions either get paid for by an employer or are written off.
Ads don't need to be relevant to content. That's the ultimate mistake with adwords. Ads need to be relevant to readers. WSJ readers are, with high probability, richer than the readers of other papers. So they want bentleys, no matter what they are reading about.