Try reaching out to the owner to see if they are active and what their intentions are. So many people came during the black outs and so many posts were floating around saying "I claimed X magazine to protect the name, if you're interested, I'll pass ownership". Do definitely worth reaching out.
Try posting content yourself and generating discussion. If it's empty but there are subscribers you can try and brute force engagement.
Make your own magazine/community and get it started. Spread awareness in all the find a new community magazines.
shepherd