I looked at the posts in the OP and I noticed two things:
1 - You cited many posts from Review Master. If you do become a merit source, I would encourage you to spend your merit to a diverse group of people, while still spending near your maximum amount of merit.
It's because there are few good quality posters in our local thread and among them Review Master is the most active most of the times. So, it makes sense why he has quoted many of Review Master's posts. Also, it seems he shares merit whenever he sees a good post regardless of who have posted this.
2 - Many of those who you cited seem to make fairly good posts, but they all seem to have fairly low amounts of merit. This could be an indication that some of the local threads that are not large enough for detected subs are lacking source merit.
Yeah true. We have very few people who shares merit in our local, the reason is they don't have smerit to share. Foe example, I have zero smerit at the moment.