What I did was make a topic telling about the site, etc. I asked them, and they said it's okay, as long as I don't just say something like "Hey! Check this out!". Topics must have more of a meaning. Mabey make a topic for posting fan videos or something. Mabey like, "Post your Mario art here!".
The admins are very kind and understanding. When they do something like that, 99% of the time it's for the better.
In return, they ask you to follow rules, which are easy to follow.