I did this primarily to have offline back-ups to read of articles that I have read previously or plan on reading in the future. Having offline access to the articles just means I don't have to worry about not having access to them if I'm not at a location with internet access.
If you find your article in here and want it removed, just use the issue tracker.
I don't own any of these articles, and I made the effort to leave the author's information in the articles. All credit goes to the author of the articles, I'm just making them a little more accessible.