I post on 3 forums at any given time sometimes within the same hour and my integration is different. The forum where I'm getting close to a thousand posts with 2+ years time there is where I'm most integrated to no suprise. I've done the whole forum thing long enough to see the pitfalls of actually becoming too involved. Anyway aside from posting posting status updates, blogs, videos etc helps with integration. fuwanovel doesn't have status updates as well optimized so that side is cut off hence why its a secondary forum.
Then of course there is the time factor spend years anywhere IRL or a forum and you'll bump into the locals more and more and they will learn your face. Lastly of course there is the speed of movement, 4chan moves incredibly fast but thats all it does for integration, fuwanovel moves fairly slowly so there is less to engage with. I digress.