Here is an excerpt from the 'Info & Policies - How & Why To Join' page:

"One way to become a VIP member is to submit reviews. After you have 2 reviews posted on the board, you become eligible to become a member with 30 days worth of access time. You will then receive an additional fifteen days for each additional review that we post. You will need to fill out a  Become a registered user before you begin submitting reviews. Your VIP Membership will be activated within 24 hours of us publishing your reviews."
http://www.theeroticreview.com/info_policies/whyJoin.asp

You can check the status of your submitted reviews by clicking on 'Account Manager' at the top of the page, then clicking on 'My Reviews' in the left-hand column.  The resulting screen will display all of your submitted reviews, the status of each review (New, Approved, or Unapproved), as well as comments if a submitted review has not been approved.
http://www.theeroticreview.com/account_manager/listMyReviews.asp

You can check the status of your VIP days by clicking on 'Account Manager' at the top of the page, and then clicking on 'Edit My Profile' in the left-hand column.  The resulting screen will show the number of days you have in your membership bank.
http://www.theeroticreview.com/account_manager/editProfile.asp

See the Review FAQ link below for additional information.