Please do not post the same thing multiple times. The board software automatically flags certain posts as needing moderator attention. This happens the most often for new users. I'm pretty sure this is made clear at the time you attempt to post. Posting the same thing over and over again just makes that many more posts the moderators have to weed through later. This makes us sad. Don't make us sad. If your post/thread doesn't appear, just wait a while. Don't post it again. If it hasn't shown up by the next day, then you can try again. I normally go through posts in the mornings, and try to check a few times throughout the day, but I'm not here 24/7. There will typically be a significant delay before posts are approved. Just be patient.
Many people (including myself) give out promotion codes with the intent to receive some value in return, such as a review on iTunes or a website. Many times, this does not happen.
To try and increase the percentage of reviews to promotion codes, I've created a promotion code tool called PromoHelper!. Developers simply upload codes to our website, and members can request a code to download the application within the iTunes App Store. There is no minimum on the number of codes you can upload, and you can increase the number of codes at any time. Members must have an iTunes Review username to download codes, so you can see what promotion code they received and if they posted a review.
PromoHelper! works on a reputation system, so if a user provides value with the promotion code (such as with an iTunes review), the developer increases that member's reputation. Members with higher reputations would be inclined to receive more codes.