Fan Tunnel is a marketing service that is basically aimed at brand managers who realize the potential Facebook truly has in terms of promoting anything, and want to maximize every single ounce of it.
In principle, Fan Tunnel will let you offer credits to people who like your page. They can then use these credits to have other Facebook users like theirs, and so on. It is a simple yet addictive system of incentives. And since fans can be individually targeted based on the country that they live in and their preferences, then it is also an incredible useful service – only the right people will be contacted. You are not squandering your energies or wasting your time on people that have nothing to do with what you are marketing.
Best of all, Fan Tunnel is a free service. The idea is to build a truly open community of Facebook users who can promote their pages and apps more focusedly. Thus, anybody can join in the action.
FanTunnel.com In Their Own Words
Earn credits for sharing good content.
Why FanTunnel.com It Might Be A Killer
Incentive systems like this one always meet with a certain degree of approval, specially when using them costs nothing.
Some Questions About FanTunnel.com
How quickly will people assimilate such a system? 
