I am aware that most people here are creators, but I am not sure if "The problem" actually is a problem.
I am pretty much of an extrovert-artist and I like to talk to other people about my art. Soooo... I used to get into contact to other artists on Deviantart the same way as I did here. Forums on Deviantart basically work the same way and I went there to promote my stuff, get to know a bubble of really nice other artists and talk to them, to have company on my way. - Do I expect to find COSTUMERS here? No way! But I did actually find artist whos writing style matches mine and with whom I can totally develop alongside.
Some day I will have a healthy bubble of supporters (whom I support aswell), so I do not get bored and frustrated posting into an empty void and then I will maybe not be seen in the forums as much to be completely honest, but I do not think this is a problem. This is just what I am using the forums for.
Especially because as far as I see it there are special places here to post and share your stories and others that are just for talking about other stuff. So it's not necessarily the way that "spamming own stuff" must disturb the others.