Where Trust Lives - An Example

Sometimes when I'm giving a link building presentation, I'll show the audience a site like this: Directory of open access journals, and tell them it's an example of where trust lives. People look confused. Eyes glaze over. So what do I really mean? And what value would a site like this have from a link building perpsective? I'd love to hear your thoughts, and I will reply right here on this post again in a few days with my explanation of the many ways a site like this is incredibly important for certain link builders.