They might not be considered article directories. I guess it depends on your definition. InfoBarrel is one.
If you submit your article to article directories you will get a link to your site (or two) for every article that becomes live on the directory site.This is great because you will boost your sites search engine ranking over time and get more targeted traffic. The article directory site earns its income from Google Adsense ads, but they will not share their revenue with you.Your “pay†is the link back for every article you submit. Article directories has been around for some years now and personally I still use the biggest of them because I get a link back from a site that is relevant and has high PR.Links from well established websites will improve the ranking of my website too, and when people search for content to post on their sites my link will transfer to their site as well.With time, I get more and more links pointing to my site. When it comes to revenue sharing sites, I can submit articles to them too and get a link back from a site with high PR.Only this time, I can get a share (between 50% and 75%) of the revenue when visitors click on the Google Adsense ads placed near my articles and other sources of revenue like Amazon, eBay or Clickbank.It would be silly not to take advantage of this opportunity.The articles you write will stay there and earn an income for your month after month.This is the best residual income I can think of. It is a good idea to start with the sites that has been around for the longest, they are probably those that will stay for a very long time as well.Google loves these sites because users create great content to them.By using revenue sharing sites you will earn money from writing articles and linking back to your own blog.It is not unusual that your article will get indexed in the search engines within a couple of hours from submitting it.How long will it take to get an article indexed if you posted it on your blog? To best way to start is to choose just one revenue sharing site first, go through it´s rules for what is allowed and what is not (you can get banned for not following their rules) and keep submitting content to it for 1 month and then take the next one.This way you will have a steady increase in your back links and Adsense earnings.You will not be successful if you try to write great content for several of these sites at once.Many have tried it but failed. Make a goal of writing 100 articles to each site, 3 articles per day.After some time when the articles get indexed in the search engines and start getting traffic and clicks you will see which articles do the best.Then it is a lot easier to write articles in the same niche. The best site to get started with is called Infobarrel.It does not cost you anything and if you put in the effort to write excellent articles (unique and helpful for the readers) you can earn several hundred dollars every month in passive income.Passive income is money you earn month after month and year after year for something you have done once.
I think Hubpages is the best site to submit your articles to get revenue sharing. They get a lot of love from Google and your articles rank real easily. I've been having really good success with them lately.