How reliable would a free lance online job like this one (below) be?

I know to blow off the “Make $4000 a month from home, while sitting on your lazy ass on the computer!” ads…but the possibility of making income via the internet IS possible. How valid is a website like this one? http://www.online-writing-jobs.com/jobs/freelance-journalism-jobs.php. Writing is, and always has been, a passion of mine.