Are article base and other similar websites (Dofollow) really helpful for SEO ranking?
No. Using article websites will not help you -- and they will likely hurt you. Anyone who says otherwise thinks its still 2004 and not 2014. Heres the reason distilled into one sentence: Why should Google give you "credit" for a link that you give yourself?
Today, you need to get PR and publicity to get 100% natural, "earned" links. Here some of my resources:
Dont think about "building" links as per the old practices that were never going to be sustainable. A few examples: directory submissions, article spinning, etc. The best links comes from using PR to promote your company, website, and content: seo uzmani