How can you get lots of referrals for free ?

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Many people has many suggestion for getting referrals for free but most of the time is not free. For example , you have to purchase a domain name or use some hosting services before you can do anything and it really cost some money. Some might suggested that using a free blog and starting to write some articles on it. I tried this before, it was really slow and not effective at all. Using an free auto responder such as Mailchimp but it is still useless if you have no traffic for your blog or website. Perhaps nothing is free. If you know any tricks or shortcut that really works , just share with us ?