Stephen references a commenter on his blog:
I think The N.Y. Times and Washington Post websites are great (although I don’t pay for “Times Select” but I do think that their site has the best presentation, appearance-wise). I always try and remember to click on the ad banners once in a while to try and keep the sites free or at least much of the content free. Opening the ads in another tab on Firefox is not so disruptive. Or click and minimize.What do you think of this practice? Do you think it is (or would be) effective? Try to put in economic terms why people do this.
(Source: Freakonomics Blog)