Many companies have content on their facebook company page that can only be seen if you ‘like’ the page. I skirted around this for a long time even talking to a guy at Facebook myself before I stumbled across a post on Twitter that revealed all! Basically what you need to do is to give something away, something that can only be seen when the visitor likes your page. In our case on Shoes.co.uk we give access to the sign up form to the £100 monthly competition, but that’s not the best use and we are working on better ones. Some companies give ‘like’ only vouchers.
Anyhow this page gives you the tools you need to create ‘like’ only content. You need to be familiar with FBML (Facebook Markup Language) boxes – but its fairly straightforward.
If the gift is good enough you will ramp up your followers!
http://www.hyperarts.com/blog/facebook-fan-pages-content-for-fans-only-static-fbml/