After posting the message, I realized that providers sometimes place advertisements but note that they cannot receive mail on The Erotic Review due to their limited membership status.
I have never attempted to submit a message without having a VIP membership.
Recent changes on the discussion boards have increased the approval time of submitted messages. It wasn't too long in the past when a message awaiting approval did not appear on the discussion board for many hours. Thus, a user's ability to participate in the discussion was untimely at best.
I appreciate the correction. A hobbyist learns something new everyday.