I know you asked this a while ago, but I wanted to reply anyway. As moderators, we don't usually reject anything from Lanchpad. A few months ago though, there was a "update" to the system that broke some of the moderator functionality and it was letting some posts get rejected without informing the moderation team. It was only for a few days, but unfortunately you got caught in it. The answer is usually the main Zebra people responding on each page are also the moderators. Each page may have different moderators. I'll take it up as an improvement request to be able to show who made the rejection in the rejection email. If you run into this again, please review your post (to make sure we didn't have a good reason to reject) and re-post.