Whenever we like a service by a company, we generally refer it to our friends and family members. We do it because we want them to take the right buying decision, without any anticipation of a reward. But now here is a company that rewards you every time you refer its services to a friend or family member. The leading web design and search engine optimisation specialist, Sigma Infotech, has rolled out its new referral scheme to reward its loyal customers and expand its reach with a special disco