10
The very only advice I can give you is as following :
[size=x-large]Open your site the widest possible![/size]If you want people to see your site, be welcoming and open. Why do you think people would register on your site, with just the promising hope they will discover what they are looking for.
Plus, I know that Google do not appreciate links which lead to nowhere. And I'm not sure either they would appreciate you filter its content.