The more I dig, the more I find. There are lots of free articles out there. Why free articles? Why dont you write your own things?
Well, when you are planning things in a large scale, like fill up about 500 articles per blog per hour, and do heavy SEO, and define options, you get a lot of visitors to your site who wish to read those articles, and if you are lucky, they would click on your ads and you would make money. Or atleast, adbrite pays you for impressions, so the more the number of visitors, the more the money that you make.
Do you think you have to copy and paste the free articles to your blog? Nopes, not at all. there are plugins that come with wordpress to do it. They give you an RSS feed which the plugin would read and publish it on your wordpress blog. If you are using some other blog software, there are javascripts that the article sites themselves provide, that you can embedd on your site, and display the contents.
Whats in it for them? Well, if you happen to click on the permalink of a certain post, you would be taken to the site of the article website, wehre they would be running their own ads, and naturally they would woo the reader to take articles from the, that means more readership for them more visits and more ads.
Thsi way, everyone is benefited.