Honestly if you see kbin magazines that are just empty and unused (as you said, lots of people have made placeholder magazines during the Redditpocalypse and then it took time to see if people would stick around, or settle on a specific magazine)), check if the owner is awol for more than a month and if so, claim the magazine and set it to delete. Ernest goes in and will clear them out (tho he's a bit behind I assume due to all the work he's doing right now on the software) but it will help with getting the unused ones cleared out. I got well over a dozen of em scheduled to be deleted myself, as well as 10 or so others already deleted.