Every month since Oct. 2013, when I began posting here, I have received my forum bonus. As far as I can remember all of my posts are at the very least 2 to 3 lines long.
If I am originating the post, I try to pay attention to the category I'm putting it in. For example, your post is more in line with the Fusion Cash board and not the Off Topic.
That may make a difference as to your eligible posts.