Article promotion was quite popular way back in 2005, but immediately after the major jagger update on Google ( mid 2005), several websites received duplicate content penalty due to publishing their articles on several different websites. Search Engines are highly discouraging duplicate content posted on several niche websites, in order to score top rankings on search engines. Google goes into an alert mode, if it detects any pre-defined pattern in link building excercise.
Of course, you can publish article after making slight changes on other websites, but you have to ensure that your website content is unique in terms of text.
