One additional very important note:
Because cache owners can change, this does mean now that your qualifying caches can change. "Placed by" is forever unchanged, while "owner name" can change. You may have a qualifying cache today, but it could change tomorrow. That may cause some confusion as to why a person's qualifying cache list has changed, and this is why.
This did happen to the 2 people I mention in my comment. Because a CO changes, their previously qualifying caches no longer qualify.
So be warned about the dynamic nature of this... your qualifying cache list can suddenly change on you.