I was just browsing through backlink checker for my competitors for a few of my websites. I just noticed the use of FREE WEB HOSTS that allow sub-domains.
Many people are signing up with these free web hosts and adding content then linking to their main website. This is a step up from posting articles on article directories.
And if you can only imagine how many free web hosts their are out on the web. The main goal would be to spend your time on one’s with higher traffic or PR ranking.
Check the links below and start building some one way backlinks 
- free subdomain hosts – Google Search
- Free Subdomain Hosts
- Free URL Redirection, No Ads! Short Free Domain Name (you.co.nr)
So once again if you don’t understand.
Free Web Hosts = Free Backlinks To Your Main Website.
