I received a reply " The average time for a public log to show up on the Social Map is 5 business days." I too use to have a paid subscription that I also let expire. Did a couple maps then.
Seems like it only took a few hours before I got them back. I would renew it if they could get them back in a reasonable amount of time. Not sure how on the amount time I was recording, but under half an hour. Hadn't done it for awhile and was just making sure I remembered how.