Look at the link Kahana posted... yes, you have to donate money to the site to be a contributor. http://www.ls1.com/forums/payments.php
No, that section is strictly for contributing members to the site.
Oh... you are talking about the MAG section. Yes. You need to be a contributor to view that section. it is a private section. http://www.ls1.com/forums/payments.php
You must be a contributor to the site.
I'm not sure why you can't post in the AAG section. You have been a member long enough and have over 10 posts. You should run this by the Admin.