I actually made these a couple years ago, so I don't know what others you've seen, but feel free to use them. I made them for fans like you because there weren't a lot of other stamps for Ouran up here at the time.
They are usually for people who have a subscription to deviantArt and post them in their journals. They show your support for something. Most people who don't have a subscription usually make a collection in their favorites for ones that they would use but can't.