It's actually really really easy to get (certainly easier than waiting!). Pretty much all you have to do is have made 3 perfect posts in the last 18 months, have at least 3 positive feedbacks, not have had a warning in the past month, and not have been banned for any reason. While this describes most of the members who use the sales comm, only a handful have ever bothered signing up for unmoderated posting!
Unfortunately, due to scammers, spammers, and people who have zero interest in using the comm as it's been designed, moderated posting is here to stay, but we definitely encourage every single person who knows how to use the sales comm properly (which is so many of you guys who are still waiting for posts to be approved!) to apply for unmoderated posting!
So if you're tired of the wait, check out this post about unmoderated posting! The link for it is right at the top of the sales comm page