Not against the rules no, that creates a lot of spam though, so we put those in Games and Rounds.
If you don't want your thread in Games and Rounds, then you shouldn't be giving people incentives to post in your thread. This includes giveaways, promos, etc. This was starting to become a pretty big problem a couple years ago with people posting service announcements then having people post in them to claim x, or having a contest, and other nonsense.
Thanks for clarifying. Even though it is not against the rules, ive shut the campaign down and locked the thread. Sorry to all I caused any inconvenience for.