This is a forum, higher members that are active do come to post on this forum daily or almost daily to learn from each other. They make posts in a way they read unique posts that they get ideas from to later make better posts too. When I met two friends some years ago, I noticed if I am arguing with one about something, the other friend is almost all the time in support of the other friend. Before I met them, they have been together for years, they have discussed many things they have agreed upon many times before I met them both. That is how this forum is. But the difference is that newbies do not know what old ranked members know, but when he began to read more than post, studying the establish members, his discussion would start to be similar with those of old ranked members and he will rank up.
Yeap, it happens that I can go to the forum several times a day, read topics, find answers that interest me, but at the same time I have nothing to write, because I found a question that interests me and I also found an exhaustive answer to it. At the moment, I understand that I'm just learning and my knowledge is very often not enough to answer how old ranked members do it.
Therefore, it is clear to me why old ranked members write more posts and get more merit for their posts. They share their knowledge with the society, they are useful for the forum and it is clear that the society thanks them for it. I see how many active forum users get a lot of merit, it inspires me, because I understand that it is possible, but I also see what kind of knowledge you need to have for this, and this is not an easy job and this is a well-deserved result.