Because this was the newest topic post right before the Tomoyo Patch release post, and the song and banners were added before that post was made. It makes a lot more sense to add the song to one of the newer topic posts than one of the old ones, and adding it to several of the topics is just unnecessary, as long as it’s added to one of the topics on the first page, so people can spot it and hear it when they visit. Alternatively, if it was only added to one of the older topics, people would just miss it. So the way it was done was the best way.
Friday 21st September 2012 
2:07 AM 
I noticed that much, but why have the audio attached to this post and not any of the other older ones like the Dog Days’-11?
Because this was the newest topic post right before the Tomoyo Patch release post, and the song and banners were added before that post was made. It makes a lot more sense to add the song to one of the newer topic posts than one of the old ones, and adding it to several of the topics is just unnecessary, as long as it’s added to one of the topics on the first page, so people can spot it and hear it when they visit. Alternatively, if it was only added to one of the older topics, people would just miss it. So the way it was done was the best way.
so basicly just more advertising for it
Yes. Obviously.