So I am asking, can such members share their knowledge here?
Sure, I can share my knowledge. Most users who have yet to rank up since the start of the merit system are probably either posting idiotic trash that no one cares to read, OR they're posting where no one will ever read it, i.e., in Bitcoin Discussion. Those are two surefire ways of never earning any merit, and only the latter is a barrier that most people have much control over. I have not checked your posts, but if you're posting in Bitcoin/Altcoin Discussion or Economics, it's a safe assumption that anything you write is immediately going to be in a 2^21-layer sandwich of shitposts, and even if your post is decent, there's going to be nobody with patience enough to find it.
Starting threads about how difficult earning merits is, is only going to get you put on some people's ignore lists that you'd probably wish you weren't on. Yes it's hard to earn them, but it's supposed to be that way. You can still contribute normally, and the only thing you're missing out on--as Vod has pointed out--is higher sig campaign earnings. Nobody is going to shed a tear over that.
I think,there's no other way of getting merits,but we should make a one constructive post,and be appreciated by the others. We need to obey and support the rules of this forum.
Here's another cookie-cutter piece of slop for the ignore list. I have a strong sense that people who write stuff like the above are just saying words they think merit-givers want to hear--and missing the spirit of things entirely.