There is a trend in article sharing sites to partly hide articles beneath a continue reading button. What is the purpose of that?
I can understand that on a blog page with many articles to chose from such a feature makes sense. Although I'm seeing it in many "one article" pages nowadays. Let's say a visitor comes from a social networking site. Being interested by a shared article, he lands on a page where the text is partly hidden by such a button. In that specific case, what is the intended purpose?