Contradictory.
Actually, it is random, but the lego moderators choose it.
ANd by moderation, im not kidding.
Every single thing in lego universe is moderated.
I put a comment on some guys creation on the site, and it took 3 days for a moderator to approve the comment.
Watch the video, see how many time he says something about mods.
It even takes a bit for your in-game name to be approved.