It is really difficult to get merit not only for jr. member but also to everyone here because even there were a lot of quality posts, they were not merited maybe because the post was not recognized or read by users since there a lot of other posts in the forum. I think the best that we can do is to try very hard to make a quality post that can be recognized by many readers or users.
I think I know the threads that you are talking about since most of them are mega threads in the Bitcoin Discussion and Economics Section. A lot of posts there are not being read by the members since most of them are not really a good posts and already being said by the recent posts. I think if you will be posting there every now and then, be sure not to post on what the campaign managers call "megathreads". There is a lot of other sections here you can post where you can gain merit.
Some users here they mostly repeated to post at that section "Bitcoin dicussion, Trading discussion and Economics section", try to explore other section so that you better know about here in forum and to have make a quality post and gain smerit. Hopefully those higher ranks members here please help these lower ranks member in order to rank up not by meriting to the account that you already know or those close to you. Legendary and Heroe members please help them so that they got rank up even full member or to member for those deserving that have a quality post.