Many sites use it and it double your likes on your page as the visitor have to like the page before he can see the content.
How to setup :
- Add a FBML App to your Page and give it a name
- insert these Code
- Upload the 2 pictures to your server and insert the path in the code
- Now go to Edit your Wall settings and change the default landing Page to the new FBML Tab you created
FBML code : Hide for non Fans
<fb:fbml version="1.1"> <fb:visible-to-connection> <div align="center"><img src="http://yourpage.com/images/thankyou.jpg"></div> <fb:else><div style="margin-top:-79px;" align="center"><img src="http://yourpage.com/images/metaprime.jpg"></div> </fb:visible-to-connection> </fb:fbml>
To test the Code you can not be the Admin as for the Admin it will all-time show all content .