Well, you've posted two things, both memes, and given that one was talking about people not posting and the other talking about niche communities not getting traffic -- and I assume that memes@lemmy.ml isn't niche -- I assume that you haven't posted to whichever community you'd like to see more traffic in. You could do so. Each new post also helps make the community more visible, at least on kbin, since it can show up in the random threads section on kbin instances.